Talk Composites - The Forum for Advanced Composites

How to get a show quality part????

http://www.talkcomposites.com/Topic34200.aspx

By mscomposites - 11/21/2019 4:12:16 AM

Are guys popping the part right out of the mold and mounting it to there 100k car, or is there a process to get the parts to that level? Coat sand polish? coat sand polish?
By MarkMK - 11/22/2019 2:51:19 PM

Markmk, we’ve tried putting down a clear face coat first which yes did give the part a d different depth look. But it also had very small air/vacuum voids that were then trapped and the only way to fix them is to sand down the face coat. Have you ran into that issue?

When all has gone to plan with the infusion, then there's never any unexpected air entrapment when using the GC50 that EC sells. Have your bubbles been evident in the sprayed coating itself or in the epoxy underneath?

One advantage of using the in-mould coating is that, when an infusion might not go well i.e. where there might have been a bit of air ingress that's happened during the cure process that's evident on the part  there is often really good scope to fix things well

Some contoured parts might end up with air 'blisters' in the corners, where the air might have collected and this can sometimes be corrected by carefully creating a hole and filling the blister with additional epoxy. The finishing process of flatting down any excess and polishing to a near invisible state is also made possible by having a coating that can take a bit of sanding and compounding