I recently covered a stoneware cone 10 piece in heavy black iron oxide, I then washed it all off, changing my plan. The resulting bisque piece is super gorgeous, showing texture etc, and it was suggested by a few other potters to leave it the way it is. Don't glaze and fire again. My question is : will the oxide "powder" eventually wear off?
And also, my desire now is to cover the piece in clear water soluble non yellowing varnish that I use on my paintings. I have done this before on bisque ware and the result is great when it is a decorative piece, and I am not using glaze but want a smoother surface.
BUT, will the oxide fade even thru the varnish?
Suggestions....thank you