Are you being serious ?DURBANS said:Oh, and on the frets there is some kind of mud forming on top, what is this?
'Mud' does not form on top of frets. Are you talking about general grime building up on the fretboard perhaps ? If so you need to clean it.
As for the pimpling (as you were told on sevenstring.org) it's oxidisation which is a common occurance on Ibanez hardware.
It cannot be cleaned off, it is corrosion of sorts.
I've got two Lo-Pro 7 trems, both cosmo and both 4 years old. One is completely covered in pimpling and the other is like new.
The more you rest your hand on the bridge the more it seems to happen but i wouldn't let it affect your playing. It happens and that's it really!