Nikkis 66 dart 270 daily driver.

We got the motor out about 40 mins ago. Nikki scraped all the big chunks of crud off the K-member and we have to go get some degreaser and black paint for the suspension and misc brackets. The guy we got it from gave the top of the motor a resale red paint job and there is over spray all over the stock (nice) paint so we have to deal with that now, what would you guys use to remove black and red over spray with out hurting the stock paint under it? I will buff out and wax the engine bay before we drop the detailed motor back in.