A quick update. The 'putting the adhesive on the wall' was a total curve ball. As for the latex, I should have gone with my gut on this one. You basically dilute it until you are happy with the consistency. My advice here would be, to keep diluting until it's dripping off the brush. Easy peazy, lemon squeezy as they say.
The advice on painting, which wasn't asked for, fell completely on deaf ears. If it floats your boat, I'm happy for you.
The advice on the process was welcomed albeit not required. Probably using the word guidance had people thinking I was a novice.
Albeit more as a hobby, I've been wallpapering for more years than I care to remember.