So I know of one operator that has placed "abradable strips" along leading edges and above windscreens of it's aircraft. These will supposedly pick up any evidence of abrasive particles in the air. So it's only going to tell you what you've already flown through, but at least you can stop flying before (hopefully) any further damage is done.
Simple solution? Maybe. Perhaps Qantas group should look at something similar. Then at least they will have some evidence to justify not flying. Plus surely other operators will co-operate with each other and share information. We aren't that cut-throat yet to deliberately mislead the opposition over a flight safety issue are we?