Advice 1: How to Polish a knife

The knife is one of the most ancient types of bladed weapons, not only extant, but also commonly used today. In the old days polishing the knife took a lot of time and required skill and ability. Now, even for such an operation as satin polishing, requires only disk on the machine and a few types of special paper.
How to Polish a knife
You will need
  • - polishing compound;
  • polishing tape;
  • - adjustable disk machine.
Prepare the knife for polishing. It is desirable to remove the blade from the handle, but you can just wrap the handle in cloth or masking tape to prevent damage to weapons.
To begin processing of the blade must be well posolennoy tape high grit (240 to 320 units) using a special polishing compound. The initial stage of polishing can continue on a polishing disk, however speed in this case should not exceed 1750 rpm. As the polishing mixture is best to use a very common fluid-based adhesive SF 300. The initial stage of polishing is completed when the blade appears smooth and uniform pattern of scratches.
Then a polishing kit you need to change the composition of the medium type. In this step, the main thing – do not overdo it. As a rule, quite a few times to walk on both sides of the blade in the direction from the butt to the cutting edge. For this stage it is recommended to use the so-called "average" polishing composition RCH Green Chrome. At the end of this stage the knife should not be scratches, and the blade appears dull luster.
Final polishing is carried out on a grinding machine using the circle from the stitched gauze, rotary still at a speed of 1750 rpm. The circle is pre-thin layer of polishing ointment. Polishing should be applied to the circle several times until the blade of the knife will be coated with a thin layer of the hardened composition.
A high quality knife with special factory coated polishing is not recommended even after the warranty period expires.

Advice 2 : How to Polish metal

Polishing metal is used to improve the surface cleanliness of equipment, parts, Troubleshooting on various traces of previous treatment (scratches, strokes, tiny bumps and small dents). There are two types of polishing: preliminary and final. For mechanical removal of irregularities on the surface of loose abrasives used pre-polishing. Final polishing is carried out fine grinding of the powders.
How to Polish metal
Metal can be polished using special polishing pastes that include chalk, limestone, diatomaceous earth, dolomite, chromium oxide, aluminum oxide and iron oxide.
Thus the surface of most fine finishes achieve a friction piece of wool or felt , oiled with a special paste. After polishing this surface will get a mirror Shine.
For the preparation of pastes for polishing metals take paraffin 20 g, 10 g tallow, technical fat, 3 g and micropowder M 50 - 67, mix All ingredients until homogenous.
Polishing metals also by chemical means, i.e. by simple immersion of the subject in a bath with a special polishing solution without using electric current. For this you can use porcelain trays or cups.
To prepare such a polishing solution, take: 350 ml concentrated phosphoric acid, 50 ml of concentrated nitric acid, 100 ml of concentrated sulfuric acid and 0.5 g of sulphate or nitrate of copper. All mix.
Operating temperature of bath should be 100-110° C. By the time you need to Polish from 0.5 to 4 minutes. When polishing will be allocated a suffocating pair, so put the bath in a fume cupboard or into the open air.
If you need to Polish some inaccessible metal surfaces, especially in small jewelry, polishing complete with chopsticks, of wood (Linden, birch, aspen). Sticks cut out this shape, which is suitable to the surfaces to cylindrical, rectangular, triangular cross section, with concave and convex working portion. This part sticks grate the cooked pasta.
For polishing of metal surfaces of large size can use various forms of blocks of wood, pre-covered with leather outside inner side.
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