Impregnated and epoxy-coated ammolite first entered the market in 1989 and the treatment significantly increased the availability and durability of the gem.
Wax offers another novel combination of advantage: a reusable surface, easily inscribed and erased, and easy combination with materials like wood that give it durability.
The exterior redwood siding was painted in three coats of white lead and linseed oil; two of those coats were covered in clean white sand to provide texture and durability.
