Quote:
Originally posted by 911SCfanatic
as usual, what JW said is gospel--except I prefer my DeWalt grinder. 
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Yeah, why the Makita plug?
I have a Makita in my work truck and it's been there for 20 years. Tired of going to the truck every time I needed it in the garage, I bought a Harbor Freight 4" grinder thinking it would last a week. That was 2 years ago. $19 goes a long way in China.
For really thin or questionable metal (read rusty on backside or contaminated with lead or brass), you can use an oxy/acet outfit with a no. 1 or 2 tip and do the same; weld a little, wait a lot. You can also go back over ground down welds that show pin holes with the O/A setup and use brazing.
Maybe rewelding with the MIG is faster, but the brazing sands down quite eaisily if you've already gotten things relatively smoothed out.