I picked up some 303 Aerospace today and started to use it on the plastic trim. This stuff is great, but will runoff harm my paint? I mixed car wash with water in a spray bottle and then went over the runoff. Will this product harm paint though if it is not removed?

 

It won't harm the paint.

I would get some quick detailer instead of using your car soap in a spray bottle. Car soap is meant to lift dirt up so that water can wash it away. It doesn't really provide as much lubrication between the particles of dirt and the paint as a quick detailer would. Some good quick detailers are Mother's Instant Detailer (takes some practice to get it streak free) and Meguiar's #34 Final Inspection (Can be used in the sun streak free).

 

#34 is god's creation and gift to those of us that are fanatics. I HIGHLY recommend it. I buy it by the gallon.

RP