Lol, i've used the drr after it sat on the shelf for a yr,, we just sprayed my bro's stang, and I haven't used dbu in a while so i was nervous but had no probs.. I had enough DBU to fill up the entire back of a full size pickup..lol... but used much of it on cheap overalls, but tossed the crappy colors.... mixed all the cool colors together.. I think you'll be fine, as i haven't had a prob yet, but people have had probs so no guarantee... but like i said My drr sat for like a yr. I used DRR1185 for most everything.