Hi all... I have recently done this... Its easy and don't have to drill anything... Ideally remove the screws & sill panels along with the rear door sill panel, remove the tool kit door, and side panels, this with the plastic lugs removed will allow holes galore to spray into... Use a paraffin type spray gun, I mix waxoyl with used oil and thinners to water it down slightly, I also spray inside the chassis and underside sills, and body, the sills also have plastic plugs, I also spray into the rear of the front wings the access is via the front doors when open... Also pay attention to the front & rear chassis and above fuel tank.