Thanks for checking in folks.............................................................. I chickened out of the Bill masking, thought I had a sheet of glass, turned out to be a sheet of clear perspex, can't complain though as I took it from an old photo fame. So masking the old sticky tape and paper way and then a bit of spray and it is done.
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Looks very blue on my monitor but I can assure you it is a couple of Sea Grey and Slate Gray. For the slate grey today i used Vallejo 71.309 Dark Slate Grey.