Project Obsession

[jlcustomz]

Todd, just posted on the bodyfiller thread again & viewed your link. The usc all metal filler is superior for an initial coat of filler in welded/ less than perfect areas, such as the top line you want crisp. You could have to stiff wire brush back to bare metal near the needed area to use it. It's basically a fiberglass/ ground aluminum formula, requires a bare metal base , does not apply or sand as easy as some finishing product & will need a skim coat of quality filler/ glazing for a final coat.
As far as sanding &shaping the upper edge , you just have to apply extra filler to the edge, block from 1 direction, then the other keeping your sanding stick flat near the edge till you achieve a square edge. then you have to carefully remove some of the squareness, which is the most artistic part of the job. A basic paint stirring stick can be a good basic sandpaper holder if you don,t have a fancy selection of stuff. At the end of the day , your skill itself is the most important tool.
You may be just fine continuing with the filler you're using, especially if you welds are continuous & solid. It just won't be as solid in a thicker area, especially if if gets hit with a falling wrench or something,your call there.
Hope this helps you some .You can pm me if you need to.