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Old 03-18-2010, 11:43 AM   #6
nuke1
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Join Date: Jun 2007
Location: Saskatoon, Saskatchewan,:
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Re: How-to-dress-metal

STITCH WELDS.

This is where it gets tricky. Lets say you have a weld 10" long, well that is a major heat source waiting to warp. Time must be taken to do this.Patience will prevail.

Well which tool should i start with? For a weld this large I either start with my 3" air grinder or my Bosch 4.5" hard stone grinder. Depends on what you have and how you feel, Now remember to go slow and let the stone do the work for you, nice and easy, remember not to rush into things, or it just gets messy. Grind a small section at a time or go back and forth over it slowly. Never sit in one spot too long or you just heated the metal and causes more work for you.

Since you have now ground down the majority with the stone, I swithch over to my Bosch grinder with a flap disc in 36 grit normally, this allows me to remove material quickly without pressure and does a nice smooth job. I never go to hard with this one either. Start at one end and go back and forth over the metal, these flap discs do an amazing job on leveling the weld and vreating a nice uniform surface, if you still feel wearily about getting too close with an electric grinder, then just finish it up with you ROLOC disc and smooth it out.

Now that I have gone this far, I will normally take my 8" MAC sander and smooth over the whole surface with 120 grit. After this is done, I use my D/A sanders and finish the job, nicely ground down and sanded, nothin lookds better than this.
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