I saw a thread relatively recently about this, but I can't for the life of me seem to dig it up. It talks about whether something like Opticoat goes under, or on top of Xpel. My car is being opticoated, and then we are putting Xpel on it. The question I have is whether Opticoat should go on the Xpel kit. Will it take away its self-healing properties? My intuition says it would as it is now the top layer. But, maybe I don't understand how Xpel exactly works. Should you put Opticoat over top of the Xpel kit? I know that from searching, Optimum says it's OK to put it on top of Xpel: it will bond and there will not be issues. The Xpel kit will still help prevent against rock chips, etc. and protect the original paint. But will it still self heal, or will marring now show up in the top layer of Opticoat?