This is a question I get frequently and would like to share info on.
Nathan Kiehn figured out how to do it. Not me.
There is a rubber bushing in the bottom of each fork leg that needs to be removed before they can be powdercoated. The bushings will melt and your fork will not reassemble correctly if you do not remove them.
They are black and hard to see, but they are down in there. They screw on to a small bolt in the bottom of the fork legs that is welded into each unit.
This tool can be made out of a piece of 18mm pipe or similar size pipe with a hacksaw, bandsaw, dremel, or grinder. Use what you have handy.
It basicly stabs the rubber bushing and pinches around it so you can unscrew it. Try to get a good hard stab first try to avoid chewing the bushing up too much. Thats all I got for you on this one. I think it works great.