I'm with you Terri- I'm thinking- why are we doing car repairs on a quilt site? Perhaps the car had a booboo needing to be fixed before hubby found out. :)
The girl at the quilt shop used one to cut my fabric purchase, but I lean on my ruler to be sure it doesn't move, I don't feel I have the arm strength to hold the ruller steady by itself. I do use a lipped one and it is more accurate.
Dents in your fabric- thanks for the smile. At least I'm not the only looney tune here. :)