Our runway is a good asphalt surface but wih my skills, I try and protect anything I can. I make skids from poplar shaped to fit wing profile and mount to wing tip with screws. It helps to be able to add doubler to the wing former you mount to but this requires removing some covering, not a problem for me as my covering is off alot for repairs.

I tried the nylon skids but they have to be glued in and they are hard to remove if needed. Have to admit I have not tried the wire type, sounds like a good idea.

Good flying,

Gary