+x GEFF - 10/26/2020 9:15:15 AMFor the polypropylene as a mould surface, I suppose the only difference to be the shining of the final part lower than the glass isn't it?I ask this because I will sand and polish or make a top coat with xcr covering epoxy as a clear coat so in this case, is there any difference between poly and glass?The interest for me of poly would be to invoid the release possible problems and poly is cheaper to replace when the mould plate is damaged with razor blade scratches to remove residues.I perhaps should do another topic for this because it doesn t match with the title anymore ^^