Hey Guys check out this Build sheet real or fake

[Ls6 Ragtop]

Stefano,
I don't think the buildsheet was ever on fire. A lot of Arlington sheets look like this because of where they turn up. Most likely it's from a reaction between the buildsheet paper and the tar paper underlayment where a lot of this plant's buildsheets are found. They are usually between the floorboard and underlayment. I'd guess the floorboard where this sheet was most likely found was pretty surface rusty from the look of this sheet.
Chris