3)   I discovered your sticky spray on your tutorial witch looked awesome to keep layers in place before the infusion (a real problem for me) but actually, all my moulds was made with epoxy gel coat (I saw it cannot be used with)... 

We'll be distributing an amazing spray-tack called Stay-Z from Zyvax but we're still waiting for our shipment to arrive. A batch of the product has been made specially for us and it's on its way to us now. It's taking a lot longer than expected to arrive but as soon as it arrives it will be available to buy on the site. The reason the product is so special is that it's epoxy based and designed specifically for epoxy infusion. Regular spray-tacks are designed for polyester resin (at best) which is very different chemistry. For lots of reasons (which I'll elaborate on in another post) if you're working with epoxy then you want a special epoxy compatible spray-tack. For less demanding applications (i.e. not against the mould surface or on less structual parts) any regular spray-tack like the 3M Scotch product or the various regular infusion spray tacks (which are basically just spray mount) are OK.

I hope this helps!

All the best, Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales