First i grinded the paint with a flap disk on the angle grinder then i made a cardboard template for the sheetmetal used to narrow the side of the hole.
I cut the sheetmetal to be welded with a small jigsaw similar to this one(i used my old black & decker)
Welded using my 110volt MIG welder set to the appropriate gauge thickness(20g in my case), started by making plenty of tack welds so heat can get away then started making 3/4 inch long welding about half a second on and half a second off and an air blower to cool down the weld to avoid warping.
Grinded the weld with a 80g flap disk on the angle grinder and we used a hammer and wooden die to "make it follow the curb of the hood" sorry for lack of better words.
For the hood, we erased the ugly red drawing then we made a straight line about 1/2 from the existing cut and perpendicular to the hood(the needed distance for the carburator scoop clearance) and use the cover from a spray can for the round corner.
I moved on to the angle grinder again with a cutting disk for initial cutting of the hood and the underside re-inforcement.
Changed to a flap disk to smooth out edge and grinder disk to reach and grind the round corner to the lines.
We then had to make one more cardboard template and the same as above to hide that lower reinforcement and make it stronger.
Now most of the welding/grinding was done i moved to the orbital D/A sander, 5in 80g sanding paper and a few hours of sanding(those painted white lines was THICK to sand) and after some cleaning with reducer/solvent i applied 2 full coat of pro-form epoxy primer, same for the underside of the hood.
Now, there is some progress from yesterday, no picture sorry.
Yesterday, I used the 3M guide coat and block sanded with 120g.
With the guide coat almost all removed, i tapped down the UP spot and used bondo/filler on the DOWN spot.
Did some more sanding(removed some with the d/A 80g, and block sanded with the 120g again)
Shot some more epoxy primer over the filler area and where bare metal spot came out only let it dry the required time then i shot 2 full wet coat of 2k fast dry(high build) primer.
Guide coated again, block sanded with 320g that time(wanted 220 but used what was availlable).
Now there where i am, am taking it easy today is really hot so am gonna be riding in the trail this afternoon
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