I have power washed and wire brushed the inside of my Texas Maid and most of the old cracked Gluvit has been removed. However, there are still small areas around some of the rivets where the Gluvit has not come off. I don't really want to go in and scrape each offending rivet with a razor blade, so is there some "easier" method to remove or dissolve the Gluvit? FYI, I plan to replace these areas with new Gluvit, so what are your thoughts on putting new Gluvit over any old Gluvit that remains?