To do it without scratching it, you can use a short piece of PVC pipe of a size that will grip it and turn it. If you aren't worried about scratches, use channel locks.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.