Hmm, you may want to try a higher bar height... I'm 6'3 as well, and that bar height seems dangerous to me. Check out what peaty and minnaar are running in terms of stack height, they are around 6'3 as well.
From what he told me quickly, thrown in a stripping tank for a few days then powercoated. I don't see why a car painter couldn't do it although you'll have to either fill up the threads before painting with putty or something or have them cleaned and re-threaded after.