what is diamonkote? is it different as polyester finish? is it better than polyester? or polly-urethan? (or polyester and polly-urethern are same thing?) are ther any difference between diamondkote and pollyster finish? and which one is the strongest finish for (ebony) fretless fingerboard(using roundwound strings)? diamondkote or pollyester? I heard "Pedulla" fretless bass(ebony fingerboard) is coated diamondkote... do you rcommend diamondkote or polyester finish?