Ceramic House Paint

On the sink, you can scrub brush or scrape with a green or almost any tool as long as it is not so strong or so he used to scratch the sink. On the counter, if it arborite, try leaving a damp cloth on the painting for a few hours. Latex absorbs a little water if it is really dry, he should wipe with a rag and some elbow grease. If its been there a long time and dries hard, you can use a plastic scraper with the cloth after soaking.

unless the ceramic is scratched it should come immediately with a little friction
If this does not work try a product called "Goof off" you can find in home improvement stores and paint stores It stinks and is not good for your skin but it works
Steve

the best way is to get a razor blade, to hold it at a slight angle and scrape, do not damage the tiles or sink just watch your hands. -)