I've just bought a second hand Fiat 500 TwinAir Turbo, and due to rough weather conditions here in Nroway, I've planned to add som extra rust protection inside the sills and the doors. I wondered, do anyone have som experience, for instance using the existing drain holes to get access? My plan was to use som Tectyl on spray, with an extensioned tube with a fine distributor at the end of the tube to get the stuff inside the sills. I suppose the doors have drain hles, which makes it easier to gain access?

Andy Monty is the man to ask