I love my purple featherweight! I bought it from a craigslist seller already painted so I can't help you. The seller had moved to Portland to live with her dad while going to school and decided not to to keep it. Her Mom gave it to her to get her into quilting. (I'm guessing Mom was probably upset when she found out daughter sold it.) The repair tag in the case was an address in Houston. I am guessing that there are a lot of featherweight sellers at the Houston Quilt show so no telling where mine was done.
I know someone who had one done by Leo at Featherweight 221 Factory (.com) but I looked up his page it appears that he doesn't do them anymore. I do know it is expensive. I've heard of people having an auto-body shop do them but I would check Dave McCallum's book for his advice on Featherweight repainting to make sure it is prepped right and you'd probably have to source the new decals yourself.
http://www.featherweight221.com/fwrx/index.html