Tubular glue - spray with Contractor Solvent, put rim on some cardboard or some other disposable thing, wait a bit, spray more, etc. At some point it should be such that you can wipe it clean.
I've never tried it but the 5 time Jr national champ in town, his dad does this with all the Zipp wheels they own (cross and road). He bought them by the case where I used to work before he started sourcing them himself.
Pro De-Solv-it® CONTRACTORS' SOLVENT™ REMOVES ALL THIS!
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"...during the Lance years, being fit became the No. 1 thing. Totally the only thing. It’s a big part of what we do, but fitness is not the only thing. There’s skills, there’s tactics … there’s all kinds of stuff..." Tim Johnson