Jellybeam, I just did a search on Maestronet (a members only UBB board for violinists) and ALL the relevant info reccomended taking it to a luthier for a thorough cleaning because "rosin is a kissing cousin to varnish" and you could severly damage the finish if you use the wrong thing. Should only cost about $15 USD......don't know what that is in pound sterling.....but surely not a great lot.