Polishing with GOI paste: a universal product for all types of surfaces

Goi paste is a universal surface polishing product.
There are several types of paste, depending on the material being polished. This instruction will tell you why you need goi paste and how to use it on metal, glass and other surfaces. In addition to the correct choice of paste material, proper polishing is needed.

Goya paste got its name from the first letters of the State Optical Institute, where it was invented in the 30s of the last century.

GOI paste: what is green mass?

The name stands for: State Optical Institute. This is where this cleaning material was created in the 30s. last century. It looks like a greenish mass, sold in the form of a smooth block and in a sealed jar.

Composition of the cleaning product

The main component in the composition is chromium oxide. The grain size of the preparation and its characteristics directly depend on its concentration. The higher the percentage of chromium oxide, the rougher the composition (variation can be from 60 to 85%).

Important! The green mixture is harmless to humans due to the fact that 3-valent chromium oxide is used in its creation, and only 6-valent chromium oxide is harmful. However, it is recommended to wear safety glasses and a mask when working, because when using it, dust appears that irritates the human mucous membranes.

Pasta varieties differ in grain size. Each of them is given a special number:

• No. 4 - rude. It contains: chromium oxide - 81%, stearin - 10, fat - 5, kerosene - 2, silica gel - 2. Light green tint, best scrapes the top layer of the material. Cleans out large scratches left after using other abrasives.
• No. 3 - average. Chromium oxide - 76 parts, fats - 10, stearin - 10, kerosene - 10, silica gel - 2. Pure green hue. Cleans out minor irregularities and scratches and gives the material a matte finish.
• No. 2 - thin. Chromium oxide - 74 parts, stearin - 10, fat - 10, oleic acid - 2.8, kerosene - 2, silica gel - 1, baking soda - 0.2. This composition is characterized by a dark green color. Used for polishing most products.
• No. 1 - thin. Nitric oxide - 65-70%, stearin - 10, fat - 10, kerosene - 10, silica gel - 1.8, soda - 0.2. It is distinguished by a dark color with a tint of green. Goi pastes 1 and 2 are designed for grinding or final finishing of the material, and give it shine and shine.

Important! The most common composition is GOI paste No. 2. It is ideal for products made of precious and non-ferrous metals, as well as glass and plastic.

Dried green mixture can be "reanimated" so that it becomes soft again. This is done using machine oil. Add 3-4 drops of machine or any other technical oil to a small piece, ground into fine crumbs. Place in the microwave for 30 seconds and grind the ingredients into a homogeneous mass.

Polishing plastic and glass products

It’s amazing but true: GOI paste can be used to restore old equipment to its former beauty! To polish plastic products, you should use GOI paste type No. 2, since more abrasive types can damage soft plastic.

It is worth noting that when polishing equipment, kerosene, gasoline and running water are not used. Only abrasive is applied to the rag, without the use of auxiliary products. The process itself is no different from polishing other materials and objects.

GOI paste for cars

Over time, scratches appear on the car body, headlights and glass dim, which greatly impairs the driver’s visibility. It would be logical to carry out polishing from time to time in a car dealership or with your own hands. A proven green mixture will help you cope with your problems.

Sand or polish?

All car owners should understand the fundamental differences between these processes.

• Grinding is a rough method of applying abrasives, which, by scraping off the top layer, level the surface. Used when serious scratches are evident. After this, the canvas will become matte, and additional exposure to compounds with fine grains will be required.
• Polishing is the final stage after grinding. The goal is to add shine to the product using fine-grained products.

Interesting! To understand what kind of GOI paste you will need for polishing or grinding the body, evaluate the condition of the car. To do this, run your fingernail over it. If it clings to a scratch, then the body will need grinding No. 3, and if not, then impact No. 2 or No. 1 will do.

Features of grinding different parts of a car

To polish the windshield, headlights or mirrors, use flannel, and felt is suitable for the body. The polishing paste is used as follows:

For glasses and headlights:

• Initially, wash the glass with water and shampoo, glass cleaner or alcohol, and wipe dry. This will enhance the effect.
• Polishing glass or headlights from scratches should be done with a special machine with a grinding wheel or a drill with a felt attachment. Manual work will only remove the dullness.

• Mix the green mass with machine oil at the rate of: a drop of oil per spoon of goya. Apply the mixture to the flannel pad of a polishing machine. Carefully treat the desired areas or, if desired, the entire glass.
• The direction of movement can be any, but the principle of lane overlap is encouraged.

• Periodically remove any remaining GOI with a paper towel and evaluate the result. Finish only when the area is perfectly smooth.

Important! If you are working on a specific area, then the surrounding area should be covered with plastic wrap so that you do not have to wash the entire car later.

• It is better not to grind excessively deep scratches, but to fill them with a special colorless compound.

Important! For glass, use only a thin mixture No. 1 or 2. Monitor the temperature of the glass, otherwise it will overheat and crack during the cleaning process.

For the body:

• To remove dullness from the body, clean the surface with a glass cleaner and wet it with water.
• Apply the paste to the circle of the car, wait until it accelerates to a speed of 1100 revolutions, and, without stopping, move across the area, maintaining an angle between the circle of the car and the body of 4-6 degrees.
• Remove any remaining drug with warm water under low pressure.

Video: Polishing a car with GOI paste

Cleaning products using GOI depending on the material

The use of polishing compound depends on the type of material.

General principles of cleaning with GOI paste

Polishing the surface at home is easy. It is only important to follow the general advice and not spoil the fabric being processed. The product is used in the following sequence:

• To prevent scratches on the surface, take a piece of rag and soak it in gasoline.
• It is necessary to spread a little green mixture on a rag and wipe it on an unnecessary object made of metal or glass. This will cause excessively large crystals to disintegrate.
• Rub the desired area with light movements without pressure until the body becomes shiny. This treatment will only take 3-4 minutes. It is only important not to scratch the treated area with large particles.
• After finishing the processing, you need to walk over the sanded object one more time with gasoline or immerse the entire product in kerosene.

Metal processing with GOI paste

Before using GOI paste, it is important to decide on the type of metal. For example, silver cutlery (knives, spoons, forks) turns green over the years and requires high-quality cleaning. In order not to accidentally spoil expensive material with roughness and scratches, perform cleaning according to the following scheme, variety No. 3:

• Wash all necessary silver utensils under running water.
• Rub with a soft toothbrush and detergent.
• Separately, pour a glass of water into the saucepan, adding a spoonful of ammonia, a pinch of laundry soap and a whisper of washing powder.
• Boil the appliances in this composition.
• Rub a piece of felt with a bar of paste and treat the utensils. Then take a softer cloth and sand each spoon for a few minutes.

Read more about other silver cleaning methods here.

• Speaking of other metals, goyi is used with great success for knives, drills and other tools. Cleaning of metals is carried out according to the above scheme.

• To polish a watch, you must first remove the watch mechanism.

• Gold is cleaned with flannel or a piece of leather with mixture No. 1 applied. Try to apply without pressure so as not to damage the soft precious metal.

Important! Remember to always apply polish to a cloth or sanding wheel, not to the workpiece. This will prevent unsightly scratches from appearing.

Article on the topic: Methods for cleaning gold.

Video: Cleaning a coin with GOI paste

Processing your phone or tablet screen

To polish the screen of a mobile phone or tablet, you need composition No. 2 and a flannel rag.

Cleaning involves the following steps:

1. Apply a thin layer of the green preparation to the flannel.
2. Pre-rub any unwanted metal or glass surface with it to remove abrasives.
3. Rub the display with light movements without pressure for 5 minutes, be careful when working with a fragile product.
4. Remove any remaining product with a clean, dry cloth. The screen will be rubbed until it shines.

Important! The product for plastic is used in the same way as for glass.

Polishing

After preparing the polishing tool, you can begin the process. To properly polish a surface, you need to carefully, without sudden movements or strong pressure, rub the desired area with polish until the surface becomes smooth. If necessary, you should return to the previous stage (if the surface requiring polishing has a large area, the GOI paste will quickly run out).

If the product has many flaws, you should use not just one type of paste, but several. So, for initial treatment, GOI paste No. 4 is applied to the rag, as the number of flaws decreases - No. 3, and so on, until the surface takes the desired form.

The treated element should be washed with kerosene in order to remove any remaining abrasive from it. In the absence of kerosene, ordinary running water can be used, but this is not recommended, since under improper conditions there is a high risk of rust. Considering that many polish the necessary surfaces in the garage, where there is often high humidity, this point should not be discounted.

Carry out polishing work outside residential premises. The ideal place would be a garage, workshop with good ventilation, or some open space. Polishing with GOI paste requires rinsing with kerosene, and inhaling its vapors is dangerous to health.

For what materials is GOI paste not suitable?

Do not forget that polishing even with such a miracle drug causes irreparable damage to some materials. It is not recommended to influence:

• gilding (risk of erasing the top layer);
• steel and nickel (except for scissors and knives);
• sapphire glass from a watch (the procedure is ineffective).

Have you used GOI at home? What advice would you give to readers? Write about your impressions in the comments below.

Analogs

If the specified composition cannot be dissolved, or the resulting effect does not correspond to the desired one, you can replace this technical product with a complete analogue. For household needs, many craftsmen choose products from foreign manufacturers, which are distinguished not only by high technical characteristics, but also by a long shelf life, affordable storage conditions, and prices. Here are popular offers from foreign manufacturers:

• Rupes;
• Dialux;
• Depural Neo.