My car has small rust holes under the rear seat but they are just above the frame so almost no access from underneat. Any ideas that do not include a frame off (no no)... Benny
Just square up the edges of the hole ie cut back into healthy metal,..grind an area 1 to 2in from the new squared up hole I'm talking nice 24 grit or 36 on an angle grinder to give a nice tooth for the epoxy. Trim the patch to extend to aforementioned ground edge then simply glue in place my go to 3m8115 Use the excess that squeezes out to seal the edges of the patch,..done If you treat the area with OSpho or similar after wire brushing the area you can then grind and do as described above and bypass the cutting and trimming process but will not look as neat from underneath but will perform the same
I had a small area on both front floor boards that had rusted through. I cut out the rusted section, then bought 2 new front floor pans and cut out the section I need to fit the holes. Welded them in. Didn't need to pull anything off the frame. Did the same with about 1/2 of the trunk pan. Shame cutting up the new pans, but it was a lot quicker than trying to completely cut out the old floor and most of the floor/trunk was still solid. Covered the weld joints with seam sealer on both sides... good to go.
Yes I will do the same on the driver side panel but under the rear seat you have no access from underneath because the frame is there. I will probably use huggers method or some metal bondo
Body should sit 5 cm or so off the frame (body sitting on bushings), so there is room to cut with a cut-off tool. You can weld it from the top, the only problem is sealing the underside of the seams. That is doable, but you have to squeeze your arm into a few tight spots. I had a couple of small holes in the same spots and I just ground it down to bare metal and used fiberglass.
