What you want to use is a product called "Prepsol" or a Poly Fiber product called "C-2210". You may be able to find Prepsol locally at a paint store or go online at http://www.stitspolyfiber.com and look for C2210.

They are both used for cleaning surfaces before painting. they remove wax and/or contaminants before painting. Be sure any product you use is completely evaporated before using the epoxy. Especially the Acetone. Acetone is a solvent for epoxies.

Good luck
Chip