I bought a tank from Craigslist that needed resealed. I have removed the old silicone and I'm working on cleaning up the corners. I have a question though. I am using a razor blade to clean the corners, but there seems to be stuff still there. I believe this "stuff" is possibly hard water deposits that just don't want to come up. The silicone on this tank was bad and on several of the seems it looked to only be sticking well in the very corner for about 1/8". I haven't used acetone yet. Do you think that cleaning with a razor blade and acetone is enough, even if some of these slight deposits are still there?


