You should discuss your situation with a lawyer and show that lawyer your exact pictures. There are two areas of law here, Copyright and Trademark. The paintings themselves probably meet a fine art exception. The prints of the paintings might not meet that exception, or they might meet it. You need to discuss with a lawyer about this exact situation. There are so many factors and I cannot make this call without seeing your exact work.
Answered on Nov 15th, 2013 at 8:10 AM