Alternate sides while welding to prevent the floor from warping.
Rust hole in car floor.
There are several ways to deal with a rusty floor.
For a larger repair the damaged section can be replaced with a partial floor panel.
Tack weld the patch in place.
Now you may begin welding it 2 inches at a time.
You ll also need to cut away the affected metal with a grinder or tin snips.
If the hole isn t too big you can do a patch repair.
To fix rust holes on your car you ll need to get rid of all the rust first.
Weld both inside and out.
My friend had a rust hole in his jeep hid father is a painter body work guy do they cut the floor out got a new floor pan drivers footwell and they are using panel glue to hold it i think that s what it s called.
Replace rusty floor panels.
If the rust damage is extensive replacing the entire floor pan with a one piece panel is the best way.
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Hold the patch in place with one hand and use your mig welder to tack weld all four corners of the patch on the outside of the vehicle.