Also consider the plastic beading strip between the wings and body. As the car flexes these rub and can squeak. Some use ACF50 which is a very good anti-corrosion oil, other 3 in 1 oil. I would avoid WD-40 as it is hydroscopic (absorbs water). Personally I used ACF50 applying with a small syringe along the beading and wiping any excess away with a cloth.
As other have said also check the rear springs and make sure they do not rub and woodwork also shackles and bolts, also shock absorber bolts can become loose.
