Avon has started marketing a "Skin-So-Soft" product with picardin, which IS a repellent. Any mineral oil is a barrier, which is somewhat effective in preventing mosquito bits.

The basic Avon product has been tested and doesn't work. Article in Snopes. My theory for why this still, decades after being de-bunked, gets passed around is it's and excuse to use a lovely-smelling skin care product and not get razzed for it.