Not sure if this is what you are having trouble with but I had trouble getting the aluminum flap fairings provided by Vans to fit so I molded some clay and layed them up if fibreglass.
Dennis,
Looks great! Do you have pictures and preferred materials used during the molding process?
A great project, look forward seeing your finished RV8
Regards,
Mark
I am flattered by the DanH competition post - he has nothing to fear from me. Nice thing about fibreglass is no matter how bad you screw up you can still fix it.
Used "Original Sculpey" modelling clay from Micheals coated with a PVA mould release. Brings out the sculptor in you. Inside edge of elec tape gave cut line on lay up.
FG trimmed & fit. Looks like it needed some finishing at this stage.