[rennch]

Originally Posted by milt

The old skul grinding disc is just the hard fiber reinforced disc. Careful when you buy them at the home stores because some of them are made for concrete, etc. That's more likely to be confusing in the section where the cutting discs are, especailly if some jerk puts a concrete one on the metal cutting disc peg and you don't see the fine print. The labels are different colors, too. Go slow while grinding and cool with compressed air or a rag.

Now, some of your welds look like they are on top of the metal. When you grind the weld, look to see how thin you are getting. You can see when the thin part heats up and turns blue faster. You will need to reweld those areas. Next, look at the welds at night with a bright light just under the weld. If you see pin holes, reweld. The last step is to use a sandblaster to clean the slag out of those minor cracks you mention. That's just uneven welding and they are little fissures. You don't need any crap in there to covered over with primer and paint. It may come back to haunt you. You can fill some of these flaws with common solder. Make sure that is really clean of all flux, again, before you paint or skim with body filler. I actually go over my welds with lead to make sure they are sealed tight.

By the way, I did this "bright light" technique and it was great. I forgot to say thanks for this great piece of advice.

So, thanks Milt.