Polishing and buffing are finishing processes for smoothing a workpiece's surface using an abrasive and a work wheel or a leather strop. Technically polishing refers to processes that use an abrasive that is glued to the work wheel, while buffing uses a loose abrasive applied to the work wheel. Polishing is a more aggressive process while buffing is less harsh, which leads to a smoother, brighter finish.  A common misconception is that a polished surface has a mirror bright finish, however most mirror bright finishes are actually buffed. Metal polishing compound classified according to following colors and each color used for special metal alloy:

Blue Color: are fine blue compound for final-stage buffing and polishing. Removes swirl marks and imperfections to leave a silky smooth, glossy finish on plastics, steel, iron, copper and most hard or soft metals. Ideal for stropping knives and razors to achieve an ultra-sharp, mirror-like finish. 

White color: Fine compound for final-stage buffing and polishing. Removes swirl marks and imperfections to leave a silky smooth, mirror-like finish on hard metals like steel, stainless steel and iron. Ideal for stropping knives and razors to achieve an ultra-sharp finish. 

Green color: Multifunction compound for both first-stage preparation (soft metals) and final polishing (hard metals). Removes visible scratches, pitting, rust and debris from copper, brass and aluminium, while leaving steel, stainless steel and iron with an aesthetically-pleasing finish. 

Red color: Fine compound for buffing and polishing of gold and silver. Rejuvenates tired-looking jewellery, watches and ornaments, giving them a new lease of life. For best results use with a loose-leaf or felt buffing wheel. 

Black color: Coarse compound for first-stage, rough-cut preparation. Removes visible scratches, pitting, rust and debris from iron, steel (including stainless) and softer metals like copper, brass and aluminium.   

Metal polishing compounds can be made easily using economic, regular raw materials and chemicals, just you need to buy the formula online from buyformula.net for producing and manufacturing this product  at this link. These formulas are recommended for new projects, small business and for beginners.