I'm currently working on a project were I'm making a mould of a
spherical garden ornament. The garden ornament is the plug, I filled,
sanded, painted and smoothed it, then I applied several layers of
release wax and then PVA. When I applied the fibreglass it caused the
paint to soften and blister, and it peals away when I try to remove
the fibreglass mould.

I have tried using car bodywork repair paint, the high build type that
is easy to sand, I also tried ordinary household vinyl emulsion. Both
of these have caused the same problem.

Could anyone tell me what type of paint won't react with polyester
resin, that I can obtain in the UK?

Other postings have mentioned Duratec but we don't seem to get that in
the UK, is there a similar product I can get here?

Others have mentioned polyurethane or polyester paint. Can I get these
in B&Q or Halfords or online somewhere? Is melamine paint viable?

Cheers for the help.

Ivan