I love sea sponges. Just rinse them out real well before using because there is a
possibility that there is some debris left over. But if its on the inside of the sponge, it really doesn't matter

. But a good rinse / soak will take care of it. Make sure the ones you have are the wool sea sponge, they are the softest and safest for paint usage. I really like using the sponges for rinsless washing.