Which to use, paper or fibre (plasterboard joints) ?

For internal and external corners when drylining you use a paper tape with metal reinforcement which is part of the tape.
http://www.british-gypsum.com/products/gyproc-corner-tape?tab0=0

 

You get paper tape for that too.
Personally I hate tape and jointing and would always recommend getting plasterboard skimmed,which is a far superior job.
Tape and jointing is used on most new builds so that they can throw them up quicker and cheaper.

 

You can still tape and joint it, but it'll take more work and effort on your part to sand and feather the filler out smoothly with minimal bumps.

 

I use fibre in corners. I sometimes use paper but it is much harder to use. You got to get the paper on just right or it won't stick or have lumps under and the tape will stand out. Also helps to dampen the paper tape but not to much.

 

You will have a lot of work feathering it out to try and make it half decent.
You would be better getting it skimmed and have a far better job for the sake of a few hundred quid depending on the room size.

 

Should of used tapered edged boards if you were going to tape and joint, but still do able scrim the joints and use Plastic beads external corners and metal reinforced tape on internals skim over really tight coat of easy fill first coat get really smooth, then apply 2nd coat straight over when dry but 6inches either side of joint or corner when dry sand with 80grit then apply 3rd coat and go another 4 inches past the 2nd coat and sand with 120 to finish befor painting you really need to seal with board sealer, all in all its a better job to plaster and way less dust!

 

Unplastered boards are always more likely to show signs of damage after a while. Moving furniture, general wear and tear, knocks and scrapes, all likely to damage the paper face and require making good

Maybe ok in a 'show house' but a regular lived in house, add kids possibly, and skimming the boards is a better option I recon