Cement composites like this GFRC torso with very high Portland cement ratios are very rich substrates for reactive stains . no acid is needed with the metal salts , thy are realy just reactive stains ! not acid stains ,
GFRC Urns . there are a dozen salts that give greens and blues on mineral surfaces like cement ! many of the best colors come from useing layers of different chemicals
Fountain stand and Ornament are GFRC . colored with reactive stains ,
This fountain I made entirely from GFRC, 4 - 6 mm thick and colored with reactive stains
Acid stained then diamond polished GFRC table
GFRC / GRC URN acid stained including handles
Reactive stain GFRC fountain spout .
Image created by scratching design onto flat plaster slab , them molding . cast in GFRC and scratch marks picked up ! image still not visible until stained with transparent iron oxide and acid stained to age , 4 mm thick