Hi! I am new to the tumbler world and have only made 2 so far. My question comes from a phone call I made to Krylon customer service inquiring about if I needed to sand my tumbler first since the Fusion is supposed to be “no sand/no prime” and was told that expoxy will not adhere to any of their products and will eventually peel off! Has anyone had this issue? Should I be using Rustoleum instead? I’m so confused and don’t want to make any more until I’m sure what I’m doing is correct. I have seen so many people on youtube using Krylon so I have no idea. Any help would be GREATLY appreciated. Thanks in advance!!!!