I've been using a mini foam roller and water-based gloss with
good results. The finish is slightly dimpled but I happen to like
it that way.

Regarding cellulose, is the finish hardwearing enough for fitted
furniture used every day, for example?

Is it feasible to spray an assembled piece of work in-situ - for
instance the guts of a large fitted wardrobe - and get a decent
finish right into the corners? I realise you'd have to mask off
beforehand.

W.