Yes, Repels-All RTU can be used around edibles.
Repels All RTU is not labeled for use inside car engines so we cannot speak to the safety of this use method. We recommend contacting the manufacturer directly for feedback on this type of application, and any clean up that may be needed. You can reach Bonide at 315-736-8231.
Repels-All RTU can be applied to hard surfaces but not cushions as it does have a lingering odor. Per the product label it is only for application to prevent gnawing and cribbing on hard surfaces, such as Decks, Patios, Garbage Cans, Outdoor furniture, Fences, etc., spray thoroughly until run-off occurs. First, test an inconspicuous area to determine if staining occurs. Repeat at 7-10 day interval
Be aware repellents can be hit or miss with cats/dogs as it is more about behavior modification and training to urinate only in certain areas outside and not in others. It would be best to limit the cats access to the area if possible or remove the cushions when not in use.