Counter Top
Yes you can as long as the existing top is secure with out any depressions or loose spots,clean it and sand it so the new mica cement will hold. Try and get the old stuff that is dangerous if not vented properly. The new stuff works but make sure it is completely dry on mica and plywood before bonding together. If,what you are working with is tough to handle,lay brown paper on surface,mica on top of it and slide the paper out when all is lined up[if paper sticks its not dry enough]press down on areas as paper slides,we used to do this on large tops when we were alone,used to be a contractor but never retired, I just quit.