Talk Composites - The Forum for Advanced Composites

Easy Composites' GC50 Epoxy Compatible Polyester Gelcoat - First time!

http://www.talkcomposites.com/Topic2075.aspx

By Carbon Tuner - 6/27/2012 11:22:35 PM

Here it is boys, something I like to think as the last step in getting a perfect part!

After stepping into the clearcoating/painting business I can tell you, with or without a paint both it is a total PITA. I cant stand clear coating a part after de moulding, then the clearcoat gets wavy or a bug in it. then i san and polish, still not perfect.

I'm starting to learn this real fast; the key to a perfect part, is taking a mould from a perfect part and polishing it there. I plan to make some really perfect molds, then try this.

 

http://www.easycomposites.co.uk/Images/products/medium/GC50_epoxy-compatable-ploy-gel-1kg.jpg

 

The site says you can brush it on, we for my size parts that would be really connivent. Now matter what the surface of the part will be perfect but if your paint strokes on the back are to thick you may see your weave get a little wobbly.

When making parts smaller than ".5 meter" I think my cup gun is a bit much? think an air brush system would work?

 
By wozza - 10/5/2012 9:33:56 PM

Hi,
    I use the GC50 Gel Coat a lot these days. It has taken me a while to get the technique right. I use the EC Gel Coat Gun at 65psi. I lay it down thick in one pass with the Gun approx 18 inches from the Mould. The resulting surface finish is quite "orange peely" to look at in the Mould but once infused the parts come out of the mould like glass, only needing a quick polish to remove the Release Agent from the surface. I must say that I have had very mixed results when I  have used the GC50 on wet layed parts. The biggest headache are "drips" from the gun on the surface if you are not careful.