Ilaria, this is a wonderful painting! As is, it looks grate! You can leave it as is or refine and there is always room for refinement. It all depends on what it is you wish to do with it. Figure out beforehand what it is that you would change and why and then decide whether you wish to make the changes on the painting or start a fresh canvas.
You can Share with your friend how much you would love to do another and how pleasing it is to paint the boy.
Wish you the best.
mischa
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