A relative wants to fit a long string of very lightweight LED christmas lamps to the outside of her house, which is a mixture of brick and slightly fragile render . The house is in an exposed location so I'm reluctant to use any kind of galvanised or brass-plated steel fixings, or to drill more holes than necessary.
I was thinking gluing very small stainless steel screw eyes, or small loops of stainless steel wire to the projecting top surface of some bricks using epoxy, and threading plastic cable ties through those to hold the lights. In January, the cable ties will be cut but the rings/eyes left in place for next year.
Any better ideas?