I've used the clear, just the same at the the coloured ones. I'm currently testing it on my license plates to see how well it stands up as the front one gets the most exposure. It's been on about 3 months, so we will see how it gets through the winter months, but so far is doing well. I've also used the clear to expand the OEM 3m patch behind the rear doors as its not really large enough to do a proper protection job, the only problem is the clear is a matte finish and not shiny so it tends to be more noticeable. Here's the sample:
I have black also but have not used it for anything particular at the moment. On the Soul forum many owners have used the Plasti-dip for rims, particular the ones with the base models that have the hub caps. The beauty of Plasti-dip is if you don't like it or screw up you can peal it off and it leaves not residue and the item is back in its original state. Lots of info on Youtube on applications too.