Toe Caps
Electrolube laquer. Available in a spray can. DIY. Probably get some from the Fairy Bay (Oh dear Fairy bays contracted out too I suppose).
It brought up some SRBF bits on the Mosquito undercarriage I did for the Pathfinder Museum very nice. Made the inspectors pencil signatures stand out a treat.
Not very good on C130J Cargo Handling Systems though.