Looks really nice John. I did the same on my Chevelle a few years ago. Spent months of evenings on my back using kerosene, plastic scrappers and paint brushes to remove the undercoating. You're right; that stuff does preserve the underbodies pretty well.
Might I suggest you give it all a good shot of Boeshield when you're done? After ten-plus years mine still looks fine.

Thanks Dennis, It is nice having a lift to do this. I do remember the days of laying on my back scraping. I couldnt do that anymore. I will have to get some boeshield good idea.

Boeshield is good. Look into fluid film and wool wax as well