OK, so a couple of years ago I bought a pair of used cross country skis. I did a little bit of cross country 25 years ago, and, finding these for a good price, thought it would be fun to have around for those rare times it snows enough in Kansas to get on them. Fast forward to today. 9" of nice powder on the ground, and a former state hospital grounds a mile away. First, PIA getting them on until I discovered and removed the ice on the bottom of the boot. Then, off to a wobbly start, and finally getting some glide going. All of a sudden, one ski started to drag. Scuff it back and forth thinking I'd picked up some debris, maybe. Finally, took it off and looked at the bottom. The plastic coating was gone. Not scraped, scuffed, mangled. Just gone from the bottom of the ski. Like, the other ski has this nice white coating, and this one is pretty much black with traces of white color, and you couldn't slide a bar of soap along it without dragging. Questions: Is this common? What happened? Is it fixable, or being a cheap set of used skis to begin with, should I just toss them? Can I use it as an excuse to say 'Been there, done that', and move on to something else (preferably something warmer and less work)?