Williams Straight Flush head restoration

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I purchased the complete head of a Williams Straight Flush with the plan of doing a practice run at a restoration.
I figure it would be a good opportunity to make a lot of mistakes and hopefully learn a lot before I try my hand at a restore that matters.
First up will be the backglass which is missing more paint than it has on it. This is what is should look like.

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This is what is does look like

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I have been lucky to find some images of the backglass on the net and manipulated them with Paint to fit over some of the worst damaged areas

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Tonight I tried out my paint pens and traced the blacklines just to get an idea of what it looks like.
I had some broken glass from an old window, so I taped up the edges to make it safe,
then printed out the image and traced it.

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I have never done any art before and this was done freehand, so I am looking forward to using some tools, practising and improving

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I've never attempted anything like this - so I'm interested in the progress !