The previous owners of the house left all kinds of outdoor knick-knacks; ceramic birds, concrete mushrooms, a turtle riding another turtle, and one creepyass clay bust. I've now had my first summer in the house. The flowers are amazing. I'm thinking of buying some blue/turquoise spray paint and painting all the outdoor knick-knacks the same color. So what's the best way to clean the items before they get painted? Are outdoor ceramic crap dishwasher safe? Or is the hose my best option?