Plaster Coving Joint Filler

PeterT366

New Member
Hi, i'm putting plaster coving up using gypsum based adhesive. Following guidance from the seller they advise using casting plaster to fill joints and gaps. I've read multiple suggestions so just trying to do the right thing and avoid cracks etc in the future, and make sure it's ok for sanding and painting afterwards.

Seems artex, caulk, 2 coat filler/jointing compound, or the adhesive are all options. What's best?
 
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