Welcome to the Quilting Board!
What a great idea, I've always been frustrated with my leftover pencil marks, Thank you
"An essential aspect of creativity is not being afraid to fail." Edwin Land
Have you tried Activeon .Its for arthritis and you can get it at Walmart. Its like a roll on pain reliever. I know about painful joints and I use this to get relief. Hope this helps.
Be kind to yourself, by being kind to others. When you help others you help yourself.