http://www.guardian.co.uk/science/2011/sep/01/space-junk-rising-exponentially-earth

I'm hoping for a tech-tastic solution

Don't you realise it is a ploy by the US to stop aliens arriving from space. It will damage their spaceships on entry and trap them here for autopsies in Area 51.

I suspect that any species that has mastered the art of traversing interstellar distances without being blown apart by space dust/micro-meteorites or fried by the various radiations out there will not be overly concerned by some pretty small debris in orbit of the target. The navigational deflector from Star Trek springs to mind.

Still, +1 for the tech-tastic solution.
I remember, I think it was Tomorrow's World or Horizon, suggesting some sort of tethered gel. The debris passed through it and slowed down a bit. After multiple passes the debris lost orbit and burned up. The trick was keeping the gel together (and getting something that would be gel like at those temperatures).

I suspect that any species that has mastered the art of traversing interstellar distances without being blown apart by space dust/micro-meteorites or fried by the various radiations out there will not be overly concerned by some pretty small debris in orbit of the target. The navigational deflector from Star Trek springs to mind.

I propose space custard.
A large ball of custard like fluid could be placed in orbit and left to drift around collecting fragments. This fluid reacts like a solid when impacted so the fragments would not pass through, but be captured, without destroying the ball itself. The ball would be large enough to be tracked and eventually recaptured for a de-orbit manoeuvre. If it works, send more balls !

Accumulating all the debris and allowing it to be extracted easily (additionally by fingers) or expelled via sneezing.

Or, like 90% of the time, swallowed.