Hi Adrian,
Sorry for the delay in getting back to you on this forum and thanks for the order you've just placed, you're right, that's a whole lot of gear; I'm sure great results are just round the corner.
I'll get back to you with some answers but could you be more descriptive about what this is? - 3" long in the shape of a dug-out canoe, that's tiny! What sort of reifnorcement have you been using (what weight?) and how have you been laying it in? You'll want to be working with some very light reinforcement on something so small.
I think your bridging problems are probably coming from a combination of the low vacuum pressur eyou've been working with (20" is really not that high) and also, probably, from bad bagging technique.
Next question is do you have a product that can be used like gel coat on small parts to get a good finish, currently using 3/4 fglass as the first layer but still get some pin holes. Just don't want to go to all the effort to setup a dump gun for a 3" part.
Yes, GC50, it can be brush applied too. Remember though that anything that goes into a mould first, unless it's totally flat, will leave some sort of a whitness on the reinforcement. If you're not doing cosmetic carbon then this won't be a problem at all though and brush application of the GC50 is the easiest thing. Your pin holes problem will dissapear.
Talk soon, Matt
Matt StathamEasy Composites / Carbon Mods - Technical Sales