problemchen mit kunstoffgemisch halli hi, i have a little challenge in front of me and wanted to ask advice. i am currently working on doorboards for a renault megane classic. its original boards should be reused. i build on these original boards mt photos and want to connect them with the original board using gfk. problem is that the surface of these sch*** boards are somehow extremely stubborn. no matter what I stick up there, nothing remains. I tried the following: 1. sand on the surface and stitch it with stick-intermediate. then use glass fiber spatula to glue the parts together. result = I can remove the glass fiber spatula completely from the board-> no connection entered. 2. surface sanded holes drilled and coated with stick-intermediate. glass fiber spatula applied and additionally pressed into the bores. Result = the same as at first, however, there was through the holes but that’s not enough because both parts were still mobile. now I want to use kunstoffprimer, since someone has a recommendation for me what’s good? or any other idea?