Aluminium Garage Door - Paint

[DerbyBorn]

My neigbour has just had her exterior paintwork done. Her garage door had a few areas showing bare metal. Since painting it on Saturday large blisters have formed in the valleys of the corrugations and some have split to reveal bare metal.

I am guessing the remedial action will be to peel off the loosened paint and then apply a suitable primer. Should it be given a wire brushing first to provide a key? (The aluminium is textured)

What primer should be used? She has asked me to 'check out' the remedial actions.

[rbel]

After spending some time checking out primers for aluminium earlier this year I settled on this

and it did a good job. Available through most decorators merchants.

[harryagain]

You need an etch primer, specially made for zinc and aluminium. Then whatever you like.