pretty simple question, is using herculiner on my fender flares a bad idea. i was also considering of doing the lower half of the doors to make it two toned. xj is white so im assuming the black liner wont look to shabby

 

the two tone will look good, just go with a finer grit liner IMO. I wouldn't do the flares though. I've always liked the body paint color on the flares.

 

xj is a 94 SE meaning the flares come flat black stock and i need to repaint them due to white rattle can mist from the rocker quick fix.

 

I used "rubberized undercoating" for the "two toned"(looks pretty good), basically was like rhino liner and all that stuff. Most of that stuff won't stick to plastic though (unless that one that you have, does). I'd do it if it's for plastic.