Hey, Guys, thanks for taking the time! 
Thanks, Johan. See, you have the right idea re. the oils. Wait until you’re competent in drawing, et cetera, before diving in like me! I read somewhere this weekend: “If you can’t draw it, you can’t paint it”. So, I’m taking parts of the painting, and sketching them over and over, faces especially. Amazing how the second and further versions look tons better than a first one.
Hey, Roja, thanks for stopping by. Yes, I’m finding oils tricky to work with, but will persevere. Should be starting smaller…
Will you ever try them again?
Frustrating “fun”, is more like it, Mark. But, I’ll keep on keeping on, and see what I can get done, even if I’m in my own workshop, and take more than the next three weeks to finish. I will have learnt a lot - always a good thing! 
Rebecca, yes a big undertaking to tackle it in oils, without the experience. I didn’t think that I was working alla prima. I started with very rough paint blocking, then worked layer on layer, with breaks for drying. No flash, just too much white and a poor photograph! I’ll try to glaze later on, and see if I can get some resemblance to an “oil” and the Master. 
Here’s the latest progress with the master study oil painting.
I think I must have made every beginner mistake known to man… 
Worst one, is how it has become so chalky and dull. Could be from using titanium white with a heavy hand, or from starting with a poorly prepared surface. Not sure, but I’m now at the point of rescuing it by repainting in subdued, and not too dark, related tones so that I can perhaps glaze it with the correct colours at a later stage - after a wipe with either linseed or retouch varnish, or so I’ve read! … Well see. 
It’s not in the original, but I kind of like the evil smile of the top devil. Accidental result - I’m finding it hard to work details with my big brushes, and have to keep coming back after letting things dry. His face will be fixed as I go along - he should be grimacing with a mouthful of her ear lobe. Bottom devil also needs his gaze not meeting the viewer.

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