2019 Navion Undercarriage flooring problem

[MarkW]

My 2019 Navion 24G has damaged undercarriage flooring (aluminum sheeting) above rear wheels
The sheeting has deteriorated with some patches where it is completely damaged (almost looks like it rotted/rusted through).
The aluminum sheeting can only be purchased in 3 ft x 20ft sections. As I only need 3ft x 4ft max I am looking for alternate solutions.
Any suggestions on how to repair would be welcome.

[Eagle5]

Hi Mark,
What about a spray-on bed-liner; might that work OK?
Eagle5

[Gkiesel]

Can you purchase aluminum sheet from Lowes/Home depot and cut it yourself?

[powercat_ras]

What about 4" Aluminum Foil Tape, available on Amazon for $ 23 for a 164' long roll.

Another option would be 6" Eternabond Tape, also available in 50' for $ 37.

[Sparky19053]

Consider checking with a metal fabricator in your area, they my be willing to provide cut to size goods. They may also offer a heavier gauge that will hold up better.

Any idea what caused the aluminum to deteriorate so badly?