In the original post, there is a comment on the cost of spray mount. Can we assume you have given regard to this before making your suggestion.
How many square metres of sandpaper would one can of the spray mount would stick, and thus what is its cost per square metre?
A 400ml can costs £21.85 delivered (
https://www.graphicsdirect.co.uk/co...-spray-adhesives/products/3m-spraymount-400ml) and will cover 10 square metres.
Do a similar assessment with the masking tape and superglue (remembering that that area of masking tape is doubled) and see how the two costs compare.
Toolstation masking tape (67832) is £2.50 for 50m at 48mm wide. So that is 1.2 square metres double coverage per roll or 8 1/3 rolls (costing £20.83) for 10 square metres. That leaves you £1.02 for 10 square metres-worth of superglue.