In recent years I've used Raka and UsComposites. The Raka is fine epoxy and sets up fairly fast. I mostly have settled on the blushless USComposites epoxy and fiberglass. The epoxy has worked fine, been blushless, and is relatively inexpensive. The setup time for The USComposites epoxy is long, around 12 hours when warm, faster when hotter, but much slower when cooler. I live in central Texas so heat sometimes becomes a factor. I like the slower epoxy. I go fast very slowly.