I'm trying to make molds from acrylic plastic parts. I know that the styrene in the gelcoat is not compatible with this type of material. I've tried several different methods of sealing the parts before attempting to make the molds. So far I've tried 2 part paint in my shop with 5 coats of paint and 5 coats of clear, this was a urethane paint. I also tried epoxy paint and epoxy resin. No matter what I try the part and the mold are both ruined. It melts the plastic very badly even under the sealing coat, but the sealing coat remains intact just very distorted. I've been extremely careful making sure that coverage is complete when trying to seal the parts. I've ordered a new interior for my car which is a 2017 corvette so I can try again, just not very cheap. Can someone please give me pointers on how to make a mold from these parts? At this point I'm thinking that the unimold system just is not going to work for these parts. I don't want an overlay I'm trying to make the interior out of 100% carbon, so I really need to figure the molds out. 

Thank you!