That's what the pros aide is for, it gives the acylic clear coat the needed elasticity. Not too sure if they will eventually peel or not, but as you know Mel I'm not after really permanent solutions for my costumes as most will be trashed during filming. Marvin Medium though I believe will have the need stretch as I was pointed towards it as a fabric glue among other things. Fabric glues require a latitude of stretch as most fabrics flex. Hope this helps some of the UK'ers in their search for a shiney finish.