Originally Posted by jbhtexas 
I've read that the issue with just doing a seal without first doing some kind of acid wash is that the epoxy may not bond to the floor well in the "heavy" spots, and come off quickly. Don't know if that's the case, but some have reported that.
that's true, you will want to do an acid wash beforehand to clean off the dirt as well as "rough up" the concrete so it will bond better.
