Wow
(And at first that subject line seemd to read "carbon angels", which is quite a picture when you add in airgel!)
But yeah, why not? The basic problem we're kicking around is doing something with an excess of the CO2, and trapping it's an alternative to getting rid of it. I picture Venus swathed in cotton candy airgel, and little scoopers coming along and grabbing chunks of it to carry away as building materials. Yeah, why not! We're waaaayyyy beyond "the sky's the limit".