I have a 2000 TJ that’s in pretty good shape considering its age. But the two triangular plastic parts at the front of the doors (no idea what they’re called) were very seriously faded and dried out. I did one application of back to black with almost no results. Did another application and the next day it was spotty looking but getting darker. After a third and fourth application… holy cow complete transformation! They look brand new. Very happy with the product and results. Will follow up with long term results.