Just saw a commercial today, Crayola markers, that suppose to really wash out. I have tried my grandsons washable crayons also, blue pens, and mechanical lead. It depends on what I"m working on. The only quilts I do mark are my HQ quilts. There is always a solution to get the marks off. I tend to use what's on hand. It's a living in the country thing, we couldn't run to the store for every little thing. Just remember, long time ago, when only HQ was the way to quilt, pencils was the only thing they used. Today on all the Heirlooms you see, I never see marks. So to answer your question, well, I think there is no one solution. Whatever works for you will work. good luck and have fun.