Hi I need to patch the cowl behind the fender and just above the fender bolts. I figuire I can just weld in some metal. So when I go to the mill what material should I ask for?
Size .020? steel?
any help appreciated

I would think the area your going to patch would be the same thickness as a floor pan.

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I came across this thickness when doing my 1969 chevelle

Goodmark trunk pans are .039 thousands thick, NPD floor pan toe boards, the toe
boards are tagged [toe board-floor pan] so I'm assuming the floor pans are the same
thickness as the toe boards and the toe boards are .033 thousands of an inch thick
from NPD.

The metal sandwiched together on the bottom inside of the rocker panels, some of it
is .060 and .040 thick, so when you're working different panels and braces, be aware
you have different thickness's of sheet metal.

Also the rocker panels are galvanized, be aware of the fumes when welding or grinding,
galvanized fumes are dangerous.

Standard sheet steel, galvanized, and aluminum are measured just a little different
in thickness. These are measurements for standard sheet steel, like we use in our cars.

Gauge Thousands Fraction

24 --- .0239-----between 1/64 and 1/32

22--- .0299----- hair under a 1/32

20--- .0359----- between 1/32 and 3/64

18--- .0478----- hair over 3/64

16--- .0598----- little under 1/16

14--- .0747----- little under 5/64
--------------------------------------------------------------------------------
1/64 = .0156

1/32 = .0312

3/64 = .0469

1/16 = .0625

5/64 = .0781

3/32 = .0938

7/64 = .1094

1/8 = .1250

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Rob

I found the aftermarket fender extensions to be a nice thick gauge to make patches from. Thats about all they are good for since they fit like crap. Stop by a body shop in your town,most have plenty of scrap they will let you route though and take for free.

I found the aftermarket fender extensions to be a nice thick gauge to make patches from. Thats about all they are good for since they fit like crap. Stop by a body shop in your town,most have plenty of scrap they will let you route though and take for free.


cool thanks for the idea

I just cut the old floor out last week, and im keeping all the good metal for misc, patches, Its amazing what I wont throw out now when it comes to metal. Never know what Ill need to patch, and metal prices are stupid around here.