I use McKee's37 Trim Restorer, which many believe to be the same as WETS, and what I have found is that "smooth" plastic trim needs to be given a light wipe after application to remove excess and "level" things out. Whereas "textured" plastic trim seems to be more porous and absorbs product more readily. I use a dense foam applicator as cheaper, more porous foam seems to lend to over-application, and when needed, do the light wipe with a MF towel.