Thanks for the more info there.
With the powder coating and acetone, I know it's a lot more resistant then spray paint but still need to be a bit careful with it. If you've used sandpaper, then it probably needs fully stripping before it can be reused properly. I've had enclosures soaking in acetone for 24 hours and the powder coat in still a complete PITA to remove (Although it's completely messed up by then). If you look on eBay you can find 99.9% pure acetone quite cheaply that should work better then nail polish remover, although make sure you wear gloves, when I didn't my nails were trashed and were breaking just by looking at them.
That's good that it's worked so well for the polished enclosure, although I'm surprised the normal water slide decals didn't work too well. The instructions say to dry it using a hair drier, microwave or oven, so I used the oven, I may try the hair drier method next though, especially if it gave you great results.
I've come up with a theory on why the imprint of the plastic part of the decal is in the paint, and that's because the paint had started melting slightly in the oven. The powder I use is done at 180'C, and the instructions say to use 100'C, but like I said in an earlier post, I think the over was set just slightly higher then that. Maybe putting the enclosure back in the oven after the decal is removed will solve that issue, I'm not sure but I'll try it, and I'm also going to set the ovens using the thermometer that I've got rather then the dial on the oven as that doesn't make 100'C clear on it.
Most likely tomorrow, I'm going to try the above improvements, putting a decal on top of one that didn't transfer right and removing a decal, just to see which method is best for re-applying them.
Also, one point of interest, I had 5 enclosures and their base plates in the oven for 10 mins, and all came out near great. I then had 5 enclosures and 10 base plates in the oven for 10 minutes, and on those ones the transfers weren't very good, especially on the base plates. I'm going to try 5 enclourses and 5 base plates for 10-15mins at a set 100'C and see if that makes improvements.
I'm on call with work tomorrow, so if I'm not called to go in then I'll be trying these again. If great, consistent results can't be achieved, then it's a easy way to label enclosures. That's the only thing that's stopped me building the VFE Rats and I've got a PedalPCB D3lay kit coming today that will need labelling.