So I thought I would share one more - from my initial drawing to the final product. In this case it took about 45 minutes - kept fumbling with the drawing.
Panel is 6x8" Terraskin glued on to 1/8 " door-skin and treated with black gesso warmed with red acrylic (see how I prepare at bottom of post). Initial drawing is water soluble pencil. I can easily wipe off and correct. Once I am happy I have used yellow China Marker for final sketch then spray down with water and remove white pencil.
Now trying to lay in the paint one spot at a time and trying to avoid blending - just side by side or overtop.
Final product - it is what it is!
Preparing panels - for small pieces I use TerraSkin or linen or canvas glued on door-skin. I increasingly like working on dark surface for these small panels - not sure why but I do. In this case I use black gesso mixed with a bit of quinacradone red to warm it. I often add an acrylic to the gesso to give it colour. I use a small cheap disposable foam roller to apply and it gives a nice even surface with some "tooth". I do not like painting on smooth surface - I like SOME tooth.
I cover the roller with a small disposable glove and it keeps moist and usable for many days.