Where the door rubber joins at the bottom at the top edge of the sill- need to pull rubber up to have a proper look
Jacking points, fronts are worse as the jack does not sit on the plastic trim very well and slips off.
If the front points are bent you have rust, on the inside and outside of the of the tubular section.
Rubber floor bungs, rot out every where. not so bad in the pan area as they can be patched easily, the ones on the inner sill are a little more tricky and tend to rot the whole sill out from the inside due to water ingress
Around the windscreen, nice square leading edge around the top of the screen, just what you don't want to avoid paint chips, also a pain to get done as the screen needs to come out.
Under the roof strips, from racks and damaged clip lugs.
Inner wings, ABS grommet. Dont let your inner wing rot out!
Behind rear light cluster, three nuts to check.
Boot lid grommets, where they join the roof area tends to rot behind the rubber.
Roof Ariel, can be fixed, always comes back
These are the hidden spots I always look in as they are structural and are £££ and ball aches.
Wings and doors are never a problem to sort out.
Everything else is a case of looking for the obvious, I find Mk3's are either really rotten or really Clean with trimless models fairing very well on the sills.
You can list a million places to look, but if its obviously rusty when you buy it, you most likely have a rot box anyway
