Awesome! I'll have to check that out. *dusts off ancient unused ebay account*
A white base wouldn't look odd in your shop, it would just mix it up a bit. Post something with the slate, then the white, then maybe something on your bust, then another texture, then the white, then slate, etc. It would make your shop pop more with different colors and textures.
I have it, but it doesn't work all that well (usually over corrects and turns everything blue), probably because I don't have 'real' photoshop, I just have photoshop elements, which is like, the bare minimum. The only thing I ever use in there is the brightness and contrast, and occasionally the stamp tool if I crop my image to my liking and I still see carpet in the corner. I've tried just about every tool in there, but none of them work the way I want. Gah! I just wish I had the money to spend on the latest Photoshop CSwhatever.