I have used everything imaginable and many times on the same boat. I like Raka no-blush and the price is right. I think $95 gets you three gallons total. However I never had any problems with any other than the one time I screwed up my mixture.
The most importantthing is to use a no blush for glass laying or.... scrub the layer with ammonia and water and sand between coats. I don't buy into that System three advice about laying a second coat on within a certain time period on a normal blushing epoxy. You can get blush in 6 hrs. Maybe you can but it makes me nervous when so much is at stake.