Skimming straight onto wallpaper

OK if
Anybody heard of this method?

My mate told me it can be done and does it regularly when house bashing, he said the key is to triple pva the walls then put scrim down any wallpaper seams using a 50/50 mix of board adhesive and multi finish

Thoughts?
Lol do yo do that on site defo don't do it on domestic
 
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