Thank you both, mates! ^^
It started to work and read better as OSL when I inverted the colours on the staff and put the white on the recesses instead of putting it on the protrusions. (just started doing it with the usual painting mood of hihglighting exposed areas to came down and discover that it was not working well for that reason)
It is also a pitty that on the side of the osl, just on the hair everything it's a bit warped due to casting and moldine, that I tried to remove before painting but did not quite succeed on dingo so. ;_(