Wow thanks for the comments. There are quite a few really detailed builds on here as well as the IH parts america readers rides forum. I usually try to look for posts that have multiple pages cause it usually means the project hasn't stalled. Lots of good info and inspiration. To answer your question yes I got excellent penetration on my plug welds. The metal was pretty thick so I was able to turn the heat up pretty high. Once the floor panels were laid onto the floor braces I take a pick tool or screwdriver and stick it down into the plug weld hole to scrape away the paint just in that spot. I realize some of the paint burns away during the weld but I was trying to coat as much metal as possible to prevent rust in the future.