In article , David WE Roberts
writes

http://www.euroffice.co.uk/i/4k8/3M-...0ml-Ref-pmount

Just doesn't seem to give a figure for coverage.

You don't need much, just a light spray. I've used the other 3M product
Spraymount which stays repositional but I've found it fine for long term
holding. No problem with wrinkling, just smooth out by hand while
applying, remove and reposition if it goes wrong. Not sure how the
adhesive would respond to solvents in any varnish overcoat though.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs