I took advise of Woody and bought Wagner's tool. It is awesome, I stripped porbably most of the truck. The only issue I had was some areas those discs cannot reach and I started using Wire wheel on Angle grinder and turned out to be my best option so far and cheap. I buy wire wheels from HF for 4 bucks each compared to 14 bucks from HD or Lowes. And by the way Northern tool 20$ angle grinder is great deal comes with few wheels as well. I used one day close to 7 hrs. in cleaning my truck and just kept working. HF only broke in few uses.

My 2 cents.

Ganesh