The kind that allows you to scrub off the softened paint with water would be easiest.

Allow this to soak into the paint for 10 to 20 minutes, then scrub the softened paint off with a stiff brush dipped into either a detergent solution or a solvent.

After rubbing it in, immediately wash it and the softened paint out with soap and water and rinse with plain water.

If you use a water-wash remover, you can take the softened paint off by washing it with a strong stream from a garden hose and using a scrub brush.

Then scrub off the softened paint with a stiff brush that has been dipped into a detergent solution, and if possible, flush the residue away with a hose.

Then scrub off the softened paint with a stiff bristle brush dipped into detergent (a toilet bowl brush works well.)