Yep, don't even bother buying grade 5 stuff. As far as stainless, I use 316 fasteners, not crappy 18-8. Or I use the ARP high strength stainless that exceeds grade rating load. I use yellow CAD grade 8 mostly, but I prefer the Zinc coating. I use Zinc coated grade 8's aswell. Just a couple of drawers of hardware. Box is full of fasteners. Being organized is important. This is my old box. Now have a much bigger box with more room for hardware. Don't waste yout time with cleaning. Buy the time you buy cleaner to clean the old bolts you could have bought new hardware. Not to mention the time it takes to actually clean them. Buy new and bold it up and be done with it.