I've been using it for a couple of years, really like it alot. It's great for copper, just be sure you aren't in a hurry, as it takes several hours, sometimes more than one treatment. Don't use the accelerator, as it is supposed to be corrosive.
It's not so great on carbon, and I use a carbon solvent before I use Wipe Out, if I'm really being picky.
Better than Wipe Out is Montana Extreme, also not corrosive, but it really stinks (I only use it outside). Faster than Wipe Out.
