I'm in the process of building my tanks. I have a few spots on my first couple ribs I would like to touch up the fillet and a couple shop heads on the rivets. What is the best way to clean/prep the cured tank sealant before applying more? I'm just trying to get rid of any dust that may have settled on it, especially since I'm not applying a large amount. Should I just give it a quick wipe with acetone?