Cleaning Floor Pans -Technique?

I seem to have finally addressed water ingress into the truck and am now on to floor repair. Where the floor has rusted, the glued-on hard insulation chips off and/or can be scraped off. Where water didn't settle and cause rust, that stuff is really on there. Any tips on the best technique for removal?

Or is it really just a use what ya' got and elbow-grease away. Was thinking wire attachment on my grinder.

To add context, here is a photo from this weekend with some arrows to the stuff I'm talking about. I believe I was reinstalling the flywheel at the time, wife thought it looked funny. The passenger side pan shows a bunch that I have already removed. Fresh paint underneath. The rest is really on there.

I think your idea of a wire wheel is best.  But I'd get as much off as I can with a scraper or somesuch before hitting it with the wire wheel just to keep the mess down as bits will fly everywhere.

Dont be afraid of trying a dull putty knife and heat gun. Less flying bits and less damage to fix later. Follwed by min spirits or goo gone and a chore boy to get the crusty part. I also buy brillo pads by the jumbo box as i clean a ton of different parts the old fashioned way.

Common thing that is done in the Suzuki Samurai groups I'm in is to use dry ice to freeze it, it makes it brittle and can be air hammered off.

https://youtu.be/qYBKccuh5yM

CRittaler wrote

Common thing that is done in the Suzuki Samurai groups I'm in is to use dry ice to freeze it, it makes it brittle and can be air hammered off.

https://youtu.be/qYBKccuh5yM

Thats what I was going to say dry ice and most of the time comes right off.
Dave  ----