If you like the sound of the 2x10 and simply want more of what you get, the 2x10 is the way to go. Each cab should then be vertically stacked to give you a vertical column of 4 speakers. Put it to one of the drummer, jobs a goodun.
I'd say it's probably polyester on the body. In which case, very fine grit wet and dry (sand wet using washing up liquid as a lubricant) should be enough to take the shine off. Dont see why you'd need nitro?
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Large - $9.75
Small - $9.00
Concentric - $18.50
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This -
[url="http://bassdirect.co.uk/bass_guitar_specialists/Clover_Apeiron_H.5.html"]http://bassdirect.co.uk/bass_guitar_specialists/Clover_Apeiron_H.5.html[/url]
The nut on one of my GBs is nickel (same as frets) - although that was done for cosmetic reasons above anything else. Does it make a difference? I'm not sure. A well cut nut as stated above is the most important... although the bass with the nickel nut does seem to sustain for a lifetime.
Larry tends to do it at all his gigs... he breaks into a jam and anybody who "wants some" can queue up in hope that they make it up the stairs to the stage.
Generally the people that get up are pretty good - you don't put yourself forward to be shamed in front of what is usually a muso heavy crowd.
I for one, thought the cocky guitarist made a right prick of himself...