Why would dealing with this be any more difficult than a solid one?
If it was solid, we'd try doing something to push it out of the way (landing on it and thrusting, painting one side white, exploding a nuke to one side of it) You can still do any of those things (maybe landing might be difficult) and if it stays together, you still push it out of the way. If it falls apart because the van der Waals force fails, it will spin itself to a widely distributed state.
So long as we take care of it in less than 900 years, that should give it plenty of time to disperse to the point where all that happens is we have a nice meteor shower to watch from the comfort of our flying car. Well, assuming flying cars aren't still 30 years away in 2950.