A pressure washer is the easiest and the best way to do it. It takes em clean off, even with a low pressure head on it

 

You can go to a local autobody supply store and ask for decal and wood grain remover , mask off the decal,spray on the remover,let it set for a short time, then take a hard plastic scraper or squeegie and scrape it off,might take a couple of times,but comes off very easy and doesn'nt leave any scrape marks. Took me about an hour.

99 scrambler 400
00 trailblazer

 

I see alot of folks recommended a high pressure washer. I wouldnt. Yes, it will take off the stickers, but will also "pit" the plastic. ie it gives the plastic a rough texture. I know. I did it on a motorcycle I own. Of course, I was holding the nozzle right next to the plastic.

 

Actually, I tried the Sawzall, ended up removing it as well with my new cutting torch, which made some cool accents on the plastic panels, and some new access holes for the engine and tranny.