How many times or how often
Instead of taking it to the car wash (which is almost always bad news for paint), I'd recommend finding a quality detailer who can maintain it for you.
Paint (even clearcoat) is porous. It has tiny little hole (pores) in it that collect and hold dirt, dust, inpurities.
Waxes and sealants fill those pores and protect the clear from damage.
If you haven't taken care of the paint, it probably could use a good paint cleaning, polishing with a buffer, and a couple coats of sealant. (basically Zane's suggestion)...
Sealant 3-4 times a year is recommended... (some people call sealants synthetic wax... last significantly longer than carnuba wax)...


