[Land-speed] A foam question

[Jim Dincau]

Mayf,
     The type of foam you use will depend on the resin system involved. With 
epoxy resins you can use polyester (cheaper) foams. With polyester resins 
you will have to use urethane foam as the resin eats up the foam. It is 
possible to get around this problem with poly on poly by completely coating 
the foam with bondo after rough shaping then sanding to contour.
     Jim in Palmdale


>>Well, more in line wih fiber glassing than foam. What kind of foam do I
>>need to get to make a buck to build a one off fiberglass piece.  I want
>>to put a slightly modified nose ont eh Sunbeam, noting fancy but more
>>aero than the blanked off grill opening.