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is cling film attacked by polyester resin?
smart51 - 13/8/10 at 11:30 AM

I want to make cycle wing buck to take a grp mould from. I'll be painting the final parts so a super glossy finish isn't necessary. If I stretch cling film over the buck and lay the GRP up on that, will it attack the cling film?

Irony - 13/8/10 at 11:40 AM

Dunno mate. I used to make a lot of GRP moulds and I always used Tinfoil.

blakep82 - 13/8/10 at 11:42 AM

i don't think it is... parcel tape isn't though, but either way you'll end up with a rough finish

Miks15 - 13/8/10 at 12:32 PM

surely you could do a little experiment?

Get a bit of cling film, a couple drop of polyester resin, leave for a while and see what it does?

will121 - 13/8/10 at 12:39 PM

quote:
Originally posted by smart51
I want to make cycle wing buck to take a grp mould from. I'll be painting the final parts so a super glossy finish isn't necessary. If I stretch cling film over the buck and lay the GRP up on that, will it attack the cling film?


think there are a few different types of cling film as some ok in microwave and some not so worth a trial first. I used it ok to wrap a blind expanded foam plug before fiberglassing all aroung it and then cutting it out. only issue was the film seemed to slacken its grip eg did not cling and went slack leading to rigdes in the finished fiberglass. cou can also get special fibreglass resistance mould release film but its not clingy

tegwin - 13/8/10 at 01:48 PM

I have used many types of clingfilm... waitrose and summerfield and neither appear to be bothered by Polyester resin... I have not tried Epoxy!

mark chandler - 13/8/10 at 04:43 PM

I put cling flim against my bodywork and made up the gap in my wings against it, pulls off easily and leaves a silk smooth finish