To paint or not to paint the underside

Thanks for the replies so far. Frankly, I detest the undercoating and would like it gone. It sucks for the reasons I stated in the first post. Yes it's done it's job for 50 years but it's normal service life is long over and seems like it's only purpose at this point is to hold dirt and grease. Car is a street machine/couple-times-a-year drag car so it does not get driven during the winter months or over dirt roads. I'm also a bit of a weight saver and getting rid of the undercoating will save a couple pounds which makes me happy. I've had someone tell me they got rid of as much as 50 lbs. but I'm not sure I buy that.

I removed some undercoating from a small area on my Coronet, it goes relatively quick with the torch but I feel like you can't get things as clean as you'd be able to with some sort of blasting process.

Looked around for a local dry ice blasting service but no luck yet.

A needle scaler is also a good idea.

Taking the car to a blasting place seems like it would be worthwhile even if it's only because doing it myself on the lift will be huge mess. It would also be much quicker. Yeah, the whole sand-in-the-rockers thing is a bummer but perhaps if you prep well enough it can be minimized. I'd only be doing the bottom and engine bay so maybe that could also help to keep that situation in check somewhat.

Doing it at home I'd clearly want to have some heavy plastic sheeting to go around the entire perimeter of the chassis and for the floor. I have one of those goofy Tyvek paper haz-mat/paint suits with a hood somewhere to protect myself from all the dirty crap flying everywhere.

The whole DIY process does not seem all that appealing to me though.