If you use the 3M and let it set up on both sides then a quick smear (as per instructions you should be fine.)
If I may make one word of caution .. if you don't let it set up and push to hard in one spot the glue can cone through the carpet.
I did let it set and to push I used a rubber sandpaper block.
It has a rounded top and a flat area where the sandpaper would be ... I found it very useful.
I worked in sections and applied the glue to the surface then just touched the carpet to that surface, it left an inprint of glue exactly where it need to be on the carpet. I did also use a 1" brush that I cut down as a spreader.
Good luck the carpet really cleans up the interior.
The door pockets are "fun"
