In most cases, though not all, yes, a rolled up painting on canvas can be framed.  The canvas can be unrolled, allowed to relax and either simply stretched, or fully framed.  Sometimes though, either or both methods cannot be performed.  Invariably, this is because the painting was painted not in quality or professional artists' oils  but in much more common,  acrylic, ceiling or house paint.  This is frequently true of the large, popular, holiday paintings  tourists  bring back from many South East Asian destinations. House paints aren't  meant to be used for painting art,  but because these are  so much cheaper,  poor, penurious artists often use them.  When this happens, none is  the wiser.  This is largely because when ...