I have tried thinning my epoxy with acetone and lacquer thinner, but, never had much success. Didn't seem to extend my working time at all. In fact, it appeared to make it less. After almost giving up on epoxy altogether, I got some denatured alcohol and tried it. It made a world of difference. So much easier to spread and, instead of doing 2-3 lures, I have done as many as 5-6 small cranks with the same amount of epoxy. Tell ya what, tho...you'll know when it's time to stop. I've found that when I dip my brush and it lifts my mixing cup off the table when I try to pick it up...it's time. Anything past that is gonna be trouble.