-
Good quality lining paper gives the best long term outcome. If you are doing a lot of small filler patches then try feathering it out with a sponge and do use Gardz.
Also, how are you going to apply the final coat? If I'm doing the job for myself I roll it on with a small roller and then even it out with a brush working top to bottom keeping very straight lines. If you use a decent roller on perfect walls you might be happy with that finish though.
Fucking hate the second stage of wall prep for decorating.
Plastering is great. Everything suddenly looks cohesive. Mist cost and initial wall prep is great as it starts to come together. Then you go back over it and realise how many defects you missed and how wonkey the walls are and you start making it all look patchy again....
... and the realisation of how much more you need to do before you're going to be able to put the final coat on.