crystalac brite tone instrument finish satin quart, waterbased polyurethane crystalac brite tone instrument finish is a high solids, super hard, scratch resistant, clear gloss finish with exceptional clarity. it is by far crystalacs hardest and clearest finish. brite tone will build to a high depth very quickly due to its high solids content and will not leave a blue cast on dark exotic wood. britetone is easy to use and can be brushed or sprayed. excellent finish for multiple uses - musical instruments, bar tops, high end furniture, crafts, woodworking projects. can also be tinted with dyes!