Following up the suggestion of "Liquid Reamer" that was made by Buckjumper to help keep my old and neglected airbrush clean, I wandered along to chat with Derek Russan at Eileen's Emporium whilst I was at Railex this weekend.
Derek does stock Liquid Reamer :-)
But he'd just sold out :-(
It must be the power of suggestion from the web ;-)
However what he did have (and I think have recently come into stock, as I don't recall seeing them before) are a set of tiny brushes, that are perfect for cleaning out paint bowls and nozzles on an airbrush:
At only £3.50 for the set, they seemed like an absolute steal. But that would be a bit rude, so I bought a set instead. If I get some more modelling done on this Bank Holiday, they may well be getting a good usage later this week.