I am trying to coat some motorcycle gas tanks (yes you heard me right) that are the plastic kind – I painted it for someone and now I’m covering it in resin for protection… largely it’s going OK. The problem I’m having is I am painting it with a paintbrush or foam brush and it seems to bubble like crazy and using a torch does not get it out (not deep enough? Not sure) I just want it to be nice and clear … any advice is helpful…thank you