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.