More than 600 people have backed the petition to protect Stone's Westbridge Park from shops and homes.

BBC: Save Westbridge Park petition 'misleading'

"A little layer of rubber -- it will protect you from a stone or a glass, but a nail could puncture that, " Thompson said.

CNN: Flip-flops present feet with a painful problem

The extract contains oleic acid, a compound that can bind with the stone and protect it, according to Dr. Karen Wilson of the Cardiff School of Chemistry at Cardiff University in Wales.

MSN: To save a cathedral, marinate in olive oil