DavidI have a few questions to ask before i can really answer yours.
Are you removing the existing body of the golf cart? are you adding or building a new frame to attach the structure to?
do you have a definite idea in mind drawings ??? perhaps you could post them here or email a sketch to me. it would provide much needed information.
My biggest concern in a project like this would be durability as styrofoam without a frame doesn't take much to destroy itself with even a minor bump.
I am in the process of building s similar project right now. there is a drawing of it on my web site under the design section. the C-cab truck is already built over a golf cart chassis -actually more corectly with the golf cart running gear as we dissasembled a perfectly good golf cart and then built a frame and body out of steel and re-installed the running gear.
the trailer float is in the process of construction as follows.
I bought two wheels with spindles and welded up a small trailer. To the frame (1 1/2 " x 1 1/2 " square tubing) of the trailer I welded the float shapes of pencil rod. (1/4" round bar stock) there is a little structural steel as necessary to make it stable.
This frame will be covered with sack cloth and duct tape. yup you read right. I will have this sprayed with foam. (look up insulation installers in the yellow pages)
this i will carve and shape to give the float its final detail.
At this point you have a bunch of choices depending on the strength/finish you want. I will be using acrylic stucco with a fiberglass cloth worked into the first coat. I finish with acrylic paints.
you could also use epoxies or fiberglass finishes laid up by hand or sprayed on.
Hope this helps.
contact me if you need more info.
--dan
------------------
Dan Sawatzky
Sawatzky's Imagination Corporation
Cultus Lake , British Columbia
dan@imaginationcorporation.ca
www.imaginationcorporation.ca www.giggleridge.com
"Isn't it great to do what you love and love what you do!"