After an auto accident left facial scars in 1926, the former Jane Alice Peters became a Sennett Bathing Beauty girl from 1927 to 1929 (by which time she'd learned how to cover the scars with makeup and went on to feature films). She became a mainstay of the screwball comedies of the 1930s before her death in a plane crash during a war bonds tour.
According to biographers, she had always been athletic, making her a natural for slapstick comedy in her Sennett days. Uncomfortable with her post-crash appearance, she often was on the receiving end of pies and mud. But I've never seen any pictures of this nor do I know in which Sennett films it happened.
I can't help you out with examples, and I have looked for them before.
However, I can tell you this. In 1976 there was a movie called Gable and Lombard with Jill Clayburgh playing Carole Lombard. Reviewers tore it to shreds for being ludicrously inaccurate and ludicrous in general.
Anyway, at some point in the film there is a scene -- in Carole's private quarters, not something done for a movie-within-the-movie -- where an enraged Carole dumps fruit on Clark's head. Clark retaliates by throwing a cake into Carole's face. I found a few stills from this scene online that I have posted below. Of course, it's Jill Clayburgh who gets caked here; she's only playing Carole Lombard.
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