Plastic Trim

On my 10 day old black Volvo, I went with Cleaner-Sealent-Wax(2 coats) and it looks outstanding. Not even a swirl, but I failed to mask off the plastic body trim and now its a mess. Scrubbing with plain water did almost nothing.How do I remove wax,etc. from the trim? Thanks much.

if i do not have any p21s total auto wash i use super clean diluted 50/50 to start with,by the way ,i did an 850 wagon yesterday and the dealer did the same thing on the last courtesy wax and this worked fine, i then used one grand ext. rubber and they look great