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Old 03-18-2010, 11:39 AM   #4
nuke1
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Join Date: Jun 2007
Location: Saskatoon, Saskatchewan,:
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Re: How-to-dress-metal

SPOT WELDS.

So you have a spot weld you want to grind down, what now, do I just hit it with a hard stone till it is beyond flat and heated the metal along the way, NOPE. stop right there, you never want to heat the metal when grinding, especially when it starts turning blue, bad, very bad, you just warped your metal and now have more work to deal with.

First thing to do is grab a 3" hard grinding stone, or one on the elctric grindre and slowly, I mean slowly, grid down that weld, get it close to the surface od the original metal, without touching the original metal. It takes practice, I know.

Once you have it close to the bottom, switch over to your ROLOC disc and start smoothing it out, never put too much pressure on the metal itself, just let the grinder do the work for you, nice and easy does it. This will take some getting use to but once it is mastered, you have won half the battle.

Now you have some marks either in 36, 50, or 80 grit leftover from the grinder, what now, leave it, nope, depending on how bad you have cleaned up that weld, you can now use your sanders and smooth them out, I always use 80 grit on my pads to do this. Sand it for a bit and you are done, 8 out of 10 tens, no mudwork is needed. You have jsut mastered the spot weld grinding.
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