I've spent the last 3 years covering this jean jacket In spongebob characters, a krusty krab, etc. Lots of little things, details and hard work.

I use water soluable paper to do the characters so I had to wash it after I finished it. But how should I wash it now that the paper is gone? Cold wash and air dry? Should I get some sort of laundry bag to put it in?

Any tips would be appreciated!