December 18, 2020
Before you apply any coatings to your cured cove base, be sure to sand down any rough surfaces. We recommend using a masonry rub stone by Marshalltown, (other brands of rub stones have been known to leave black marks that do not come off), or using a rub stone made from your leftover coving material.
Sand until you have a perfectly smooth surface. Your glove should not be able to snag on anything.
Any fine white lines from sanding will disappear once you add a coating. Remember to clean up any dust from sanding before moving on.