I too have considered a powdercoating job. What you have to take into consideration is how much the frame is worth to you to begin with. Is it really worth it to you to spend the money repainting, or would you rather save that money for a frame that already has a nicer paint job? Granted, powdercoating can be done for relatively cheap (there is a place near me who will sandblast and coat a frame for under $100). The durability of powdercoating is indeed nice, and is probably one of the best reasons to get it done. As for thickness, powder coating is noticeably thicker than a nice automotive paint job or stock paint job. However, from a few feet away, honestly who is going to notice? Powder coating is becoming available in more and more colors. Check your local powdercoater for options.