Thanks rmichael .Your advise worked like a charm , I ' m old school - used to mix own paint out of chalk , wood glue and soap water - plus the colors . it used to take 3 guys to do one wall - 2 cutting in - one rolls at the same time or it would dry spotty . that was 1976 in old country - Russia before tha latex paint arrived . anyway ,I am working in md dc area about 30 years now . Thanks again Mike .