What to do with the failed paintings?

Like most artists, I have a number of canvases with paintings that did not go as planned. I also have difficulty throwing out or wasting the canvas and stretcher bars.  At times I have just removed the canvas and re-stretched some new canvas.  You always have to be careful that your old painting doesn't come creeping through if you do decide to paint over them - so I tried painting fairly thickly over a somewhat thinner painting underneath.

With this painting, I had a large, 36 x 48 canvas that had not worked out.  So I turned it sideways and sketched in a new idea from a photograph I took in Sept. 2019 at an art fair.  I had asked a couple guys with cool retro bikes if I could take a photo of them and their bikes for a potential painting.  They agreed and this painting below is one from these photos. 

Completed 36 x 48 Oil on Canvas Title? - 'Hecks Angel' maybe (or DeathSpoke Rider - which is the name of the retro bike group here in Edmonton)

The first bit of charcoal sketching going on after gridding.

  

I outlined the charcoal in Cadmium Orange Oil paint - cause I love the bright hit of colour it provides

A close up of the face in progress