I used to play guitar some - a sweet electro acoustic steel body.
Metal strings - THE HORROR!!!!!!
Well the missus just bought herself a pretty acoustic - with the steely torture devices - we where having none of the old pains so came up with this pretty simple but effective method to thwart the blood n weeping.
Step 1: Tools N Materials
Tools = scissors
Material = bike inner tube - one from a racing wheel - one from a larger mountain bike type tire
Step 2: Steps
Take your racer inner tube and cut a piece about 10mm long
Take the larger inner tube and cut a piece about 5/6mm depending on the size of the front portion of your finger ya wish to protect
Make a single cut through the larger ring - see pik
Step 3: Fitting
So - take your small hoop and push the floppy ends of the big one just through untill they come out about 10mm, fold them back and kind grip the who;e thing.
Taking care slide the whole thing over you finger, untill the small ring is just over the first knuckle.
re adjust - pull gently on the floating ends till the whole thing is snug but not tight - - see piks
Move on to the next digit.
Simple, cheap, easy to replace and ya get loads of material in case you break or lose a cover.
One thing - depending on the size of the smaller ring/hoop ya might find your fingers start turning red/blue - three ways to help/stop this
Before fitting the covers, gently stretch the finger hoop to expand it a little
Use bigger tire tubes
Instead of inner tube some form of tape should work as well , but be a little more fiddly fitting into place
Step 4: Fini
These worked great - they where fully adjustable - did not ride upwards as the nail was in the way - tight enough not to ride down - did not stick out anywhere and catch other strings - only covered the required area.
Hope they work for you guys too.
All the best