Hi,
Please see pics below of the mould and the part after infusion.
The mould has been applied 6 passes of easylease, 1 pass of wax and 1 mist of pva before laying fabrics.
All the timing between passes has been respected, and pva was left overnight to dry.
Composite spray glue from ec has been used to keep the fabric in place.
When it came to extract the part, some small areas detached as they should fine but the majority had the gelcoat stuck on it, as visible in the pic.
I was afraid of a long sanding job but tried first with a chisel and small strokes and with much relief chips by chips all the stuck gelcoat came away with leaving a glossy part surface.
My questions is:
- what could be the reasons why the gelcoat was so adhered (I use adhered and not bonded because with some mechanical force the gelcoat separated) to the part? 

+x

 

Massimiliano - 1/7/2021 8:24:17 AM

Hi,
Please see pics below of the mould and the part after infusion.
The mould has been applied 6 passes of easylease, 1 pass of wax and 1 mist of pva before laying fabrics.
All the timing between passes has been respected, and pva was left overnight to dry.
Composite spray glue from ec has been used to keep the fabric in place.
When it came to extract the part, some small areas detached as they should fine but the majority had the gelcoat stuck on it, as visible in the pic.
I was afraid of a long sanding job but tried first with a chisel and small strokes and with much relief chips by chips all the stuck gelcoat came away with leaving a glossy part surface.
My questions is:
- what could be the reasons why the gelcoat was so adhered (I use adhered and not bonded because with some mechanical force the gelcoat separated) to the part? 

By further thinking about the whole process I think the only explanation could be the spray adhesive. Maybe the solvent in it dissolved the pva and the release agents.
For the next part I would like to avoid that spray adhesive, what do you use to keep the fabric layers firm, especially in tight corners etc?