Perhaps not ideal. You can select all in the cello part of the piano layout, Edit->Filter for Playing techniques, and hide it in the properties panel with set local properties: locally. Might be other playing techniques there also, though.
Not at my computer to check, but IIRC, if you select a bowing in the score and do Select More (Ctrl+Shift+A several times), it will select all bowings, but only the bowings. So if you hide the selection in the properties as @jesele suggests, you won’t lose Pizz., Arco, or other important ones that you might want to keep in the score.