I find that I have to use sources that naturally change rather than relying on a cause which is solely derived from man made purposes. I discovered that by allowing the paint to dry slowly and at different rates that I have to think and work a lot quicker. It is remarkably intense to use this process. It seems that nature itself has its own deadlines. I wouldn't be able to complete a project successfully if I didn't have trust or faith in these practises. Linseed oil mixed with the paint on a sized linen or cotton canvas is sufficient, rather than using other unnecessary gimmicky materials. These are traditional methods where science and craft become one.