That bit is 1/2". I like to use a bit slightly larger than the weld. If I'm careful, I can cut down to the substrate panel and not leave an edge that I still have to sever with the Steck knife. I bought a set of 4 sizes of bits in a case that I "thought" were lifetime guaranteed to stay sharp, but I can't find a receipt for them or a sticker on the case to contact. All but 1 are rather dull now. Maybe I got cheap, er frugal, and bought them from Eastwood or Auto Body Toolmart without the warranty..
Yep, the original color was Lemonwood. It won't go back to that...
I thought I had a happy floor until I found the latest rust thru. I don't see anymore problem areas, but there is still small specks of rust in pits. I will be dusting them with converter and cleaning off what isn't needed. Then I will go over the entire floor with w&g and shop towels. I did a fair section of that yesterday and I guess it won't be as bad or time consuming as I had dreaded. I also read I need to top coat the primer/sealer within 3 days to avoid needing to scuff, so I will have to get whatever paint I want here before I start any of that.
As a side note, it appears we sold the family cabin. There are a couple contingencies that "shouldn't" be a problem. Once the contingencies have been satisfied, they have about 2 weeks to do that, I will feel confidant that I will eventually have the funding to take this car all the way and may have it painted this year too. If it goes thru, the closing is Oct. 15th. and I wouldn't want to wait until then for paint, so may use other collateral for a short term loan and have it painted during warmer weather. It would be really nice to have 1 of the herd "done".