Ran into my first instance of corrosion. One of the buldkhead framesgave me a nasty surprise when I peeled the plastic off. About 15 or so blotches of corrosion. I went at it with a combination of sandpaper, ScotchBrite and 3M wheel in my die grinder and got it all cleaned up. This was easy to do as I'm already treating everything wtih Sanchem and epoxy priming so going through the alclad was no big deal.
