How to polish with GOI paste: professional advice and useful information

GOI paste, developed back in the distant 1930s in the bowels of the State Optical Institute, has not lost its former popularity even now. You can hardly find an owner who doesn’t have a piece of this green (and sometimes other colors) product hidden somewhere. Let us remind you how to use GOI paste and give some tips on the safe use of this “greetings from the past.”

Types of GOI paste

Today there are four types of GOI paste on the market:

• No. 4 is used for primary processing of the material, if it has not been processed before;
• No. 3 gives the surface a matte appearance, eliminating all remaining strokes;
• No. 2 and No. 1 finish what their “older relatives” started, making the surface glossy and finishing the polishing.

The type of GOI paste depends on the size of the abrasive used in its manufacture. The paste was produced in a hard (bar) or softer (box) version. Why do we talk about GOI paste in the past tense? The fact is that at the moment, not a single Russian plant has the right to produce this product due to the presence of chromium oxide in its composition, which is hazardous to health - this compound is a carcinogen, i.e. it accelerates the development of cancer cells.

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GOI paste is considered one of the most famous and useful chemical products from the point of view of industrial and household use. Show in full... It is worth noting that the described product was developed back in the 30s of the last century and until today is a popular composition, widely used in the applied arts, technical industry, restoration, etc. This paste can be found in virtually any department or store with household goods or radio electronics. Despite the fact that a particular product is considered specialized, virtually everyone knows about its existence.

Preparation for polishing

The action of GOI paste consists of the work of small abrasive particles, which, through friction, erase irregularities from the surface. Before you start polishing, you need to prepare a small piece of soft cloth and soak it in gasoline (it is not necessary to use car fuel; gasoline for lighters will be enough). A small amount of paste is applied to the material. Using the prepared tool, you should first wipe the unnecessary metal surface to remove excessively large abrasive particles, otherwise the desired surface will not be polished, but damaged. You don't want to see a scratch on the surface after polishing, right?

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).

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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.

Advice

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.

Features of the material and scope of application

Organic glass is produced from acrylic acid through various chemical reactions. This material is similar in various parameters to ordinary glass, but its nature is organic (hence the name of the material). There are several synonymous words - plexiglass, acryplast, carboglass, etc.

Among the main characteristics of plexiglass we can highlight:

• ease;
• softness;
• ability to easily transform;
• flexibility during processing;
• high throughput;
• When exposed to certain chemicals, plexiglass decomposes.

Polishing soft metal products

GOI paste can be used to polish items made of any metals, including soft ones such as silver and gold. This procedure will help restore the former shine of your favorite utensils. But polishing such objects requires a special approach.

Let's look at the polishing process using silver spoons as an example.

1. Before carrying out the procedure, you should thoroughly wash the spoons and clean them with a stiff brush (an ordinary toothbrush is ideal) with tooth powder applied to it.
2. Then a solution is prepared containing ammonia, tooth powder and soap shavings. All this is mixed until completely dissolved.
3. Spoons are soaked in the resulting solution.
4. Then the mixture should be put on fire and brought to a boil.
5. The spoons are removed, washed in running water and then wiped with GOI paste.

It would be better to use types of paste No. 1 or No. 2, since the other two can leave scratches on expensive utensils.

RESULT: HOW AND WHAT TO CLEAN BRASS AT HOME

Having considered all the options and methods for cleaning brass products, we can conclude that the most appropriate is to use professional products made taking into account all the nuances of such surfaces. If the alloy needs to be cleaned, and nothing other than “folk remedies” is at hand, the best results can be expected from aggressive, acidic environments. They must be used carefully, following all the rules and not too often. Products containing abrasives are used extremely rarely and carefully to avoid scratches.

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.

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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.

Where should you not use GOI paste?

It would seem that GOI paste is a universal remedy. But no, there are surfaces that should not be touched with this polish due to the fact that such a procedure will either make no sense or cause harm.

Firstly, you should not polish mechanical watches with GOI paste. Types No. 1 and No. 2 will only enhance the visibility of small scratches and emphasize them, and pastes No. 3 and No. 4 can simply erase the top layer of metal, causing the watch to lose its former luster.

You should also not use this product to polish sapphire crystals on watches - there will simply be no effect, since sapphire crystal is very durable.

General information

GOI paste - what is it?

The abbreviation stands for State Optical Institute, where this cleaning powder was created in the 30s of the last century. Externally, this paste is a greenish mass, which is sold in the form of a smooth block or sealed in a jar.

Paste composition

The main ingredient of the paste is chromium oxide. Its concentration can be different, which determines the characteristics of the drug and its granularity. The more chromium oxide in the composition, the coarser the mass.

REFERENCE! This paste is harmless to humans, due to the fact that trivalent chromium oxide is used to create it, and only 6-valent chromium oxide is dangerous to people. However, when working with this drug, it is better to wear a mask and safety glasses, as when using it, dust may arise that irritates the human mucosa.

Types of pasta

There are several types of pasta that differ in grain size. Each of them has its own number.

1. Number 1 - thin. It has a dark color, shimmering with green. Designed for grinding in or finishing the material, and also gives it shine and shine.
2. Number 2 - thin. It has a dark green color. Used for polishing.
3. Number 3 is average. Has a pure green color. Designed to protect minor scratches and unevenness, providing the material with a matte finish.
4. Number 4 - rude. It has a light green color and can scratch off the top layer of material the most. Designed to protect large scratches left by other abrasives.

REFERENCE! The most popular is paste composition number 2, which is excellent for precious items, as well as plastic and glass.

If the green mixture has dried out, it can be made soft again. This is done using machine oil. You will need to grind a small piece of paste into fine crumbs and drop 3-4 drops of machine or other technical oil onto it. The resulting mixture should be microwaved for 30 seconds, and then grind the components into a homogeneous mass.

Precautionary measures

At the beginning, we mentioned that GOI paste is not currently produced in Russia due to its toxicity. However, it is sold freely in stores whose owners were able to supply the well-known polish. And if a person purchases this remedy, he should know some precautions in order to avoid tragedy.

• You need to use GOI paste extremely carefully, avoiding contact of its particles with the mucous membranes of the eyes and nose. If you are unable to protect yourself from this, immediately rinse the affected surface with running water and call an ambulance.
• Use a respirator or at least a medical mask when working with polish, especially when polishing metals using a cloth soaked in gasoline. You should not expose your body to the risk of poisoning from vapors of chemically complex substances.
• Keep children away from polish storage areas.
• Work with the product while wearing gloves to protect the skin of your hands.

So, GOI paste is an effective, but unsafe remedy. Even if you have used it for polishing many times, you should always be on guard when working. If the situation allows, it is better to use more gentle methods.

RECOMMENDATIONS FOR CLEANING BRASS

What is contraindicated when cleaning brass:

Use of coarse abrasive; Frequent use of citric acid, as it is the most aggressive of the acids towards brass surfaces; Clean with coarse cloths and brushes with a high degree of rigidity.

How to prevent excessive contamination of surfaces:

• Dry cleaning of products is carried out at least once every 7 days;
• Try to avoid direct sunlight on the surface of the products;
• Do not store brass items in areas with high humidity or in close contact with other metals.

In difficult cases, when it is not possible to carry out complete cleaning using available means without the risk of damaging the product, it is recommended to seek help from specialists.