I bought my 1st disco last year that's a 59 plate and looking to keep hold of the vehicle for a long time. However, some corrosion is starting to become visible around the wheel arches and chassis area. I have enquired about professionally rustproofing the vehicle but simply don't have the cash to pay someone. Are these diy Dinitrol kits easy to apply and adequate in protecting the vehicle rustproofing kit I've never applied any corrosion protection coatings to a vehicle before.