I am marking sewing lines on the back of a square to make two triangles. I have a water erasable marker but it seems to be kind of finicky. I am wondering if it would be ok to use a regular pencil to mark these lines. I can say that it would make marking thes 48 squares go a lot faster! The water erasable marker usually takes several times of going over just to get a line to appear. Do you think this would be an issue. I did a search and it looks like some people have had issues with pencils on quilts, but I am hoping that because it is on the back, it wouldn't matter if it doesn't come out as I will be sewing over it anyway.