fantail launch had gone green !
All the brasswork was covered in a slightly oily verdant substance. Looking at the areas around the air holes I can only assume that this is a residue of the solid fuel camping tablets I use to power the model. Why they should cause this is a mystery - the model has been stored in the dry out of season.
A quick rub with some Brasso wadding had things gleaming again. The a bit of water in the boiler and a touch of heat had the engine turning over like a good 'un. Mind you, if the rain doesn't stop, the boat stays in the box. The open hull will collect more water on top than underneath !