The problem with this stuff is that the surface is rough and when the
resin gets into the pores and rough parts of the foam plug, the inside
of the part is rougher than hell. It is very hard to sand it smooth.
Also, when you go to melt out the foam with acetone you get a gooey
sludge of the foam as residue that has to be cleaned out of the part.
Messy business, at best. At least this has been my experience with the
stuff - and also with the blocks of green foam that you can buy at a
hobby store or WAL Mart.

Best to take some time and make a good plug from non meltable foam or
wood or plaster of paris, then wax hell out of it before doing the
layups.

John Schroeder

 
> -Question about 'white foam' from Jerry Fisher-
> Jerry;
> Think the reference is to what is commonly known as 'Styro Foam'.
> Expanded Polystyrene, also known as EPS.
>
> Gary R
>
>