The artist has to be aware of and know how to deal with previous bits and pieces from the old painting. If you're someone who likes to paint in a thin layered style this technique will frustrate you greatly. But if you are someone like me- who likes to experiment, scrape and sometimes even destroy the layers underneath to create some kind of new craziness you will enjoy it.
If you have varnished the old painting you will need to remove the varnish before attempting this technique. I don't usually varnish my loser paintings so that's not going to be a problem with me. If I thought one was good enough to varnish I usually put it up for sale and it's long gone.
20" x 24"
oil on canvas over board (Pintura™)