Now that I'm ready to start ballasting my Atlas track, I was looking for something to keep the rails clean during glue application. I remembered chassis grommets from my electronics days (used to keep wires from chaffing on sharp edges), and thought they might work as rail covers. I got some from Mouser and they work OK. The catch is that they come coiled up and you have to convince them to straighten out. Stretching them and applying a heat gun works. Then I put the sections on a 40" straight section, turn it upside down and apply the heat gun again to complete flattening them out. When I'm done spraying wet water and applying 50-50 white glue with a drip bottle, there is invariably some glue on top. I remove the grommets slowly and all is well. 
