epoxy spray

[pat123]

so i can cut hte fiberglass cloth to any shape and lay it on the styrofoam. then put resin on it?

[Gippeto]

You were going to try "lost foam casting" eh?

Use epoxy on styrofoam, you are correct that fibreglass resin (polyester resin) will melt your foam.

Been there, done that, and learned from the experience.

[jackssmirkingrevenge]

Something from wikipedia about surfboard construction:

Surfboards are usually constructed using polyurethane foam. They are made stronger with one or more small pieces of wood going down the middle of the board called a stringer. The foam is molded into the rough shape of a surfboard called a blank. Once the blanks have been made they are given to shapers. Shapers then cut, plane, and sand the board to its specifications. Finally, the board is covered in one or more layers of fiberglass cloth and resin. It is during this stage that the fins, or boxes for removable fins are put on and the leash plug is installed. Another method of making boards is using epoxy resin and polystyrene foam, instead of polyester resin and polyurethane foam.

[Gippeto]

A quick primer on laying fibreglass cloth;

http://www.streetrodstuff.com/Articles/ ... Page_2.php