Ta for the concern folks, all duely noted but I've a little bit of practical experience with spray painting so know whats involved . Toxic it may well be but if you're well covered and masked tis no bother , and most treatments can also be brush applied. As for buyers/surveyors or valuers -how many of those really look at the roof timbers (I know mine didn't).Cheers for the protim link twas what I was looking for, and Ninsaga the pros wanted €500 from me thats why I'm going spending a ton or so on the fluids and half a saturday banging my head of the rafters