How can I cover a sliding glass tub track?

I just used a wash rag. But they can be easily removed. They are only screwed into the grout line and caulked onto tub. Just remove the screws and cut the caulk and pull off. Clean off the grout, and touch up hole in grout wth grout or caulk. We do it all the time.

I took my doors out too so that I could more easily clean the tub. I just prop my foot on the inside of the rail on the tub, but mine may be set up differently than yours. I used to bathe my 50-lb. male dog in the tub in the winter and had to be careful putting him or out not to "drag" him across the tracks. I finally made a sling out of a towel and it worked like a charm. Ha, ha. He never could figure out how he ended up in the tub, but once in he stood like a statue. He's a hoot; my rescue dog.

Kelli is correct. They are not permanent. They can easily be removed. The ones on the wall are screwed in. Fill the screw holes with caulk after unscrewing them. The one on the tub is caulked on. Just pry it off. Use something plastic like a credit card to scrape off the caulk.

Getting under the ones attached with grout will be tricky. I used dental floss and a metal drywall blade to get under mine. The grout can then be scraped or sanded off the tub and the tiles after you pry off the rail.

In my sisters house they were installed with something like liquid nails. The aluminum was easy to remove but the residual adhesive is work to remove.