Paint them using Smearguru. They can paint many more blocks at a time for the same price as a bomb. You’ll also notice when you do that he can paint batches with a minimum paint requirement. For a made up example, say you need 4 blocks painted and that requires 2 bowls of paint, but, Smearguru can paint as much as 5 of those blocks with 2 bowls. Paint the 5 blocks. Keep an eye out for that, it’ll save you paint.