BURNISHING (which means):

To make smooth or glossy by or as if by rubbing; polish.

To rub with a tool that serves especially to smooth or polish

tar·nish v. tar·nished, tar·nish·ing, tar·nish·es

v. tr.

To dull the luster of; discolor, especially by exposure to air or dirt.

To detract from or spoil; taint: a tragedy that tarnished our hopes.

To cast aspersions on; sully: slander that tarnished the senator’s image.

v. intr.

To lose luster; become discolored.

To diminish or become tainted.

n.

The condition of being tarnished.

Discoloration of a metal surface caused by corrosion or oxidation.

The condition of being sullied or tainted.

[Middle English ternisshen, from Old French ternir, terniss-, to dull, from terne, dull, of Germanic origin.]

maybe you mean:

burnishing – to make smooth or glossy by or as if by rubbing; polish.

varnishing – to give a smooth and glossy finish to