On 30/09/2019 15:10, Michael Chare wrote:
The wiper blade arm on my car is very hard to remove from the motor
spindle, possibly because that part of the arm is aluminium and the
spindle is steel.Â* Would greasing the spindle be wise and would it make
much difference waht grease I used?


Unless it is positioned wrongly, normally the only time you have to
remove them is if you are replacing the motor (or possibly getting
access to something behind it). I'd always change blades "on the car".

But yes, penetrating oil such as Plus Gas or WD40 should help, also a
puller. Then wire brush to remove corrosion products. Petroleum jelly
AKA vaseline is a neutral and reasonably water resistant grease. You are
sure it is not held on by a nut under a flip-up cap of course?