#2
EBow but that involves holding it instead of picking.

The Planet Waves fat finger screws onto your headstock for more sustain, two of them may do a good enough job

You can get pedals which help sustain.

There's only two ways of 'infinite' sustain which are the EBow and a sustainer pickup, the pickup's the bets option but if you only want long sustain there or other methods ranging from types of strings to types of guitar
#3
Erm, compressors?
Quote by buckethead_jr
I didn't think they had metal in the 1790's

Quote by Guitarislife125
Copper is a metal

Quote by buckethead_jr
Ah, touche.