When to glue Brantho Korrux Nitrofest with foil? How much time between 2 layers and drying?

Servus together, I have to work a little bit between the bumper and the car at my focus because there varnish has burst off… there probably a little water has penetrated and it has rusted minimally. Then you will also generally look at the whole time and the possibly aborted varnish at the edge there completely 2x with Brantho Korrux Nitrofest roll over so that the sheet is again “airtight” and nothing can rust. After that I want this place with paint protection foil provided dami t the bumper there can no longer scrub.. on fresh lacquered spots this is probably rather bad… How long should the paint (with mounted bumper) dry before I put on the foil? How much hours should lie between the 2 layers at Brantho Korrux Nitrofest? Will it then dry for 24 hours (of course then without bumper) in the current weather before I bring the bumper back on?