Sanding, grinding advice?

I have recently purchased a grinder for the Mavericks body and floor, I bought grinder wheels, tested them on the metal, hehe well.... I sorta grined at an angle and made small teeth marks but I did it in a place where I was working on a huge dent anyways so I taped it off and marked the imperfection are, should I cut it and replace it with 18 ga metal or just get a welder and try to fill in the claw marks? Or anything to fill it in the I don't have to use filler, also I know to use sand pads on it not grinders, only for the floor so any advice on metal work thanks! I do learn fast so

 

Grinding wheels eat metal fast. A flap wheel will be more forgiving.

 

I have to say.... You have given me lots of good advice rthomas771!!! Thanks for helping us fellow members!!

 

Thanks!! Yea I was considering one but wasn't to sure, thanks again!

 

flap wheels come in different grit sizes the lower the number the coarser the flap

 

Yea I'm aware of that, I'm just going over all the paints grinding down the new(old) paint over the original paint and the primer so I have one layer and don't go to bare metal so I can do rest by using the flap sander when I get it all down to the one layer

 

I've had good luck with a wire wheel on a grinder for removing layers of paint gently. You just have to take your time. I've gotten both front fenders on the kid's car down to original paint/ primer.

 

a sharp razor blade will work great too you can peel the paint off down to the primer a friend of mine recently stripped a whole car with just a pack of blades ( he is retired with a lot of time on his hands)

 

I tried that, I just kept cutting into the metal after I used that grinder for one spot and got to bare metal, it was okay but I seen like dark marks and when I run my hand over it I can barely feel it but I wanted to feel smooth and feel nothing then "almost" perfect, so I had another idea, the first one made claw marks in the metal, the second one made real small scratches that were a little deep, so now (already did it and succeeded) I used the grinder to sand away the original paint, the recent paint, to the primer, did get a few spots to bare metal but went over it with some 180 grit paper and it's perfect, nice and shiny, and smooooooth to the touch so if anyone tries to sand there car then good luck and hope this helps, btw only paid 20 for the grinder and the grinder wheels were $8 for 4 (came with an extra for free cause of the grinder) I used an entire wheel just for one quarter panel and the floor pans and still has life in it for later use!

 

I agree with Jeff - I have used a ton of these wheels on my car - ones from Harbor Freight work just fine

 

I used a combination of chemical aircraft stripper and a 3m stripping disc. The 3m I used lasted longer than any other disc I tried. You can attach it to a drill to avoid getting the metal too hot and warping panels.
https://images.search.yahoo.com/ima...444qhb&.crumb=X83pa/9F.0X&fr=ipad&fr2=p:s,v:i

 

This was the outcome

 

A da sander with 80 grit works well too if you see sparks you are removing metal ,metal that usually has to be repaired

 

So far I almost got all the floors sanded down and I bought some duplicolor rust spray, turns rust to primer to prevent rust in the future