Well, since I fabricate a lot of small parts & brackets for my bikes & racecar, the convenience alone would be worth it.
If I was doing something to large to fit in an oven, I would have it done.
The H-F p/c system normally sells for about $60, $48 with a 20% off cuopon. The powder they sell is about $5 a color.
Between time & fuel to take it somewhere to be done, it wouldn't take a lot to make it worth while, PROVIDING it does an acceptable job.
There are quite a few chrome (rusted) parts on the Savage that I would like to clean & p/c instead of paint. I would like to turn it into a 'Minight Edition Savage' with most of the chrome blacked out.