I opened one of my tins of galvafroid last week & there is very little liquid left in it, just a gloopy solution of zinc in the bottom. I know there are 'special' thinners for it but is there a cheaper alternative?
Xylene/xylol/ aromatic naphta should work. The msds has solvesso 100 which is a higher boiling fraction than xylene. What is readily available where you are?