I put a couple of layers of Poorboys EX-P on the new S back in November, then a layer of S-100 a couple of months ago. I now want to apply a coat or two of Wolfgang. Do I need to do any type of prep to remove previous layers? Obviously the car will be washed before Wolfgang. Thanks in advance for advice.

 

yes. you should remove everything on there before applying wg.

wash > clay > wg = good results

wash > clay > pc or rotary w/ compound > wg = great results