I have started turning pens and now intend to make my own blanks. I am going to use your "water Clear" polyurethane casting resin and our polyurethane pigments to relate the solid colours. Will I be able to use other types of pigment powders, such as "Pearlex" to make contrasting features without extracting from the resins strength? Also, what depth of resin can be put into a mould in one pour? I want to make my blanks about 20mm square.