I used liquid sandpaper, basically a de-glosser to prep, then wipe clean. Did four light coats "after each dried", that is important part....Good luck.
Nothing to it but to do it.
SIMPLE AS THAT.
'01 TJ Sport, 4.0l 5sp man.
2"BDS coils,Bilstein 5100's, 32/11.50/15 Falken Wildpeak AT's yellowed out, on Black steel D's.