I used this method to fix multiple holes in firewall. Worked well I thought.comments
Fast- 1/2 hour
Some shrinking issues but controllable with more experience
Firewall thickness was very forgiving
Thinking of trying on cab corners and back wall of cab
Attachments
IMG_1645.JPG (264.75 KB, 48 downloads)
IMG_1964.JPG (179.88 KB, 51 downloads)
IMG_1649.JPG (275.8 KB, 46 downloads)

John
37 Chevy 1.5 ton
17 Dodge Brothers Roadster
23 Dodge Brothers Touring
23 Dodge Brothers Coupe
73 Plymouth Scamp 2 dr