paint problem

Wait.. you decided to paint your kit after you had it assembled? Wouldn't have been easier to paint the undersides and body separately? That's what most folks do anyways.

Or you should have masked the areas to prevent paint from overlapping onto the blue. Ah well, live and learn.....

Mask off the surrounding area and spray over the part that has the wrong color error.

Is the spill an enamel or acrylic paint? Assuming that you used Tamiya Mica Blue spray, it's a lacquer paint and if your spill is an acrylic, it should be no problem to clean it off using alcohol.

However, it would be problematic if it's an enamel based paint.

If you mask and respray, mask along panel lines, paint only the affected area (door, fender, whatever).  Use a good masking tape from hobby shop- Tamiya tapes are super-good.

THanksalot fort the advice guys. I am going to mask and respray the panel.