Start with one early ninties gay board.
Sand paper the ba-jesus outta it.
stop, drink some refreshing Tang, continue
Sand paper some more (hell of a lot more)
Primer and paint the bottom and lay a satin wood finish on top
Buy some grip tape and lay it down (regular grip tape is too narrow for a fish board, so cut it how it pleases ya)
matt black the bottom, get two pieces of coloured paper and spend over FOUR HOURS CUTTING THE GOD DAM MEGAMAN STUPID DESIGN OUTTA PAPER THAT YOU DID WHILE YOU SHOULD HAVE BEEN LIVING and stick it with UHU stick glue, clear glue over the top.
Me and dev also got second hand metal trucks and made rises outta rubber from clark rubbing using a drill press and some tin snips. right now im looking at new wheels so i can ride the dam thing down the hill, its already got new bearing and bushes. before you know it you'll be hittin a dry kidney pool for some summer fun.
Me boards;
All i need now is a board the size of a shoe and one the size of a surfboard and im set... for the ladies... i hear they like.. stuff.