If you hate the feel of PVC under your thumb and don't want to spend the time installing binding (and therefore refretting) then you're going to have to get rid of your thumb (or wear a glove) and then buy somebody elses time instead. Besides, paint doesn't feel any better than "PVC" anyway. If you have an aversion to PVC then try ABS, acrylic, pearloid, glass, brass, carbon fibre, wood, bone, jelly, clay or vegemite. All of these will have a better and longer lasting effect than paint. I'm afraid you're going to HAVE to find the time to do this properly or else you'll feel a right pranny for attempting something that most people would avoid out of general sense. Good luck, post your results and I hope you're able to prove the rest of the world wrong.
Have you considered the easier option of giving up guitar and taking up drums? It could be your calling in life.