Question

For refinishing, it is recommended to sand the existing finish when the mil thickness is at or exceeds ________.

Options:
a) 0.01
b) 0.1
c) 0.5
d) 1.0

Answer 1

In refinishing surfaces, sanding should start when the existing finish exceeds 0.5 mils thickness to ensure proper adhesion and aesthetics of the new finish.

Step-by-step explanation:

When refinishing a surface, it's important to sand the existing finish to create a smooth base for the new finish to adhere to. The recommended mil thickness to begin sanding is typically when it exceeds 0.5 mils. At this thickness, the old finish is substantial enough that it may affect the adhesion and aesthetic of the new coat if not adequately sanded down.