By Leew - 6/1/2014 4:16:12 PM
Hi, about to make a CFRP part using a female mould and want to know the best coating to use for the part.
I see two diffrent gelcoats on the website which are sutible for an epoxy layup, the Epoxy gelcoat and the GC50.
I read that the GC50 gelcoat is difficult to apply by brush and I do not have the means to spray it.
Is the regular expoxy gelcoat (https://www.easycomposites.co.uk/epoxy-bonding-polyester-gelcoat-clear) easier to apply by brush?
I read that the regular epoxy gelcoat is not as UV resistant as the GC50, the part I am making will be used outdoors but mostly stored indoors and only be outdoors for upto about 20 hours per week, will UV damage be a problem here if I was to use the epoxy gelcoat?
Are there other coatings available other than the epoxy gelcoat or GC50 which I could use or Is there anything available which I could spray into the mould without requiring a professinal spraybooth and air fed respirator (I only have a regular paint spraying gun and a cartridge respirator with A1 and P3 filters).
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By Fasta - 6/3/2014 12:49:18 PM
I think you need to use a gel coat or in mould coating to be sure your surface has no porosity.
Taking a composite part to painter and expecting them to deal with pin holes when doing a clear coat is something they are not used to doing. Car panels don't have porosity but composite parts are generally full of it.
Use a gel coat, an in mould coating, infuse your parts,,,,,,,,,,or buy an autoclave!
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