Just for fun, going big!

A 48x36" of something pretending to be canvas with a really bad painting on it - useful for anything? Maybe for practice using really big brushes and other tools in my closet that I have never tried? So turn it upside down and cover it completely with acrylic paint leftover from another project. Find a loose image for subject matter and see what happens. 
What have I learned from this so far?
- On a hot dry day, the acrylic paint dries way too fast for finesse.
- Big brushes of poor quality are ok for painting walls, not art images.
-  This fake canvas takes acrylic paint pretty well. I wonder what it is.
- I like the looseness of my brush strokes on the foreground.
- Throw it away now. The painting might end up looking great, and then what would I do? Hmm, I could cut it out of the stretcher bars and mount it on hardboard and add cradle bars.
- NO.  Do not waste any more of my limited painting time on a poor quality canvas. 

** I think the Caribou Migration painting is finished, but I am having trouble getting a good photo of it. Lighting issues again.