I would love to weld but I only have experience with MIG and everyone seems to prefer TIG~ which are expensive lol.

 

you can do it with mig also, just got to go really slow and jump around . small tacks until its completely filled. even with a tig you got to go slow on sheet metal.

my tig has been getting WELL used lately fixing ricer wannabe's ideas that happened to be on my car when i bought it.

 

If it weren't for fact that it needs painting now, I'd just paint some plugs and stick them in. Since you need painting, you should really look at doing some body work, but no need to weld. Just sand, epoxy a piece of sheet metal from the bottom, fill in the top with bondo-glass (fiberglass in easy to use bondo form) and sand it back down flat. Sand the whole hatch and repaint. This is the least ammount of work for the best results.

 

TIG on thin body panels is not a good idea-... TIG welding will put MORE heat into the metal than you would if you were to do so w/ a properly set MIG.

MIG will allow for instantanious wire to metal contact whereas with the TIG you'd have to stabilize your arc and control the puddle diameter to the proper size-... THEN you add filler rod.

that 1/2-1 second will count on thin metal. thin gauged metal will warp very easily.