I have used raka and uscomposites epoxy with the 6 and 4 oz e-glass from uscomposites. The raka was very good and faster than the uscomposites. Right now I use only the uscomposites 635/556 slow nonblushing epoxy. It is slow (I'm in Texas)...I like it that way. I'm very happy with it and will stay with it. I did detect some blush with the raka...but none at all with the slow uscomposites epoxy. I have used the 1 to 1 thick epoxy for mixing up goopie and I like it. I'll get some more.