Watercolor Effect

I asked this question before with not really any luck with responses.. so figured I would ask again..

Is there anyway to achieve a watercolor effect with texture fills or other way? Like this this truck or watermelon? 

The pig in tractor is mine.. I played around with the texture fills with that one...  The available textures are VERY limited and very dated in my opinion...... hoping there is maybe someway to create, buy additional texture packs?