You can use whatever color you want under it, just gotta remember that whatever color you go with will be showing through all the speckles. Resin isn't very hard to use, it's a learning experience. just gotta get a disposable mixing bowl, paint brushes, gloves, small mixing stick, the resin and hardener. The hard part is getting the right amount of hardener in the resin, too much and it dries before your done, too little and it doesn't completely dry. A little extra is alway better than too little. I normally let mine sit for 24 hours to dry completely before painting it.