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FT Pro, Mem SOG,'08 Cert Excellence PSA, '02 Schroeder Portrait Award Copley Soc, '99 1st Place PSA, '98 Sp Recognition Washington Soc Portrait Artists, '97 1st Prize ASOPA, '97 Best Prtfolio ASOPA
Joined: Jun 2001
Location: Peterborough, NH
Posts: 1,114
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For starters I would not use turpentine as a medium for oil paint except to sketch with in the very first layer.
If your surface is not "white" enough, you might consider using an oil primer instead of flake white. I know that Winsor-Newton makes one but by nature, "oil" has a color.
If you really want a stark white ground, I would suggest that you get another hardboard that has an acrylic gesso primer.
A layer of flake white will leave brush strokes and do you really want that as a first layer? Also, if you sand this layer to smooth it out, you would have to be extremely careful as flake white has lead in it and you shouldn't let that become airborne.
The Old Masters and most of the painters that I know prefer to begin a portrait on a toned canvas.
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