I've got 1/8"-1/4" base metal that is painted rusty and brittle, will be patching with up to 3/8" plate. Trailers pulled off road by DOT. Was going to go with all purpose 211 at .068 diameter. Starting to lean toward 311 5/64" diameter. Wont be welding anything over 1/2", fillet welds only. Appearance is not a factor, but I do like 211 characteristics. Any suggestions or better alternative to the two that I might be missing. I might go with both and build my own preference. Thanks, Jeff