To Powder coat or to not.. that is the question.

My current smoker is not powder coated and while I could have had it done at the time of purchase (I was quoted 1500 dollars to get it done), I am noticing that the high temps are wrecking havoc on the high temp paint. Is it worth having it powder coated? I was also considering selling my current smoker and going to Shirley Fabrication and getting larger. Would powder coating help the resale price?

Firebox is not insulated..

My firebox is the only place that is affected right now.. the rest of the smoker is fine and the paint looks great.