Wasps.

[brownfingers]

I have a cottoneaster hedge which is absolutely swamped out with wasps. Is there anything I can spray on to make it distasteful to them?

[roitelet]

I don't think there is anything you can use. If it is flowering now it is the nectar they are after and as soon as the flowers are over they will depart.

[brownfingers]

It never flowers. Just gets red berries on in winter. I wouldn't mind, but its right at the side of the car door and they tend to dislike me getting in and out of the car!

[roitelet]

If it has berries then it flowers. They are insignificant but there never the less. One thing I found effective was a false wasp nest suspended above, in this case strawberries, worked.

[cheops]

Roitelet is correct here - there were small [probably] white flowers earlier in spring. Look out for them next year brown fingers.
People looking for shrubs attractive and beneficial to bees are often recommended to plant cotoneaster.

[Jungle Jane]

I read they don't like peppermint oil,mix with water & spray on in the evening? They won't like that,it could make them more annoyed than the opening & closing of the car door,be careful! You could try making a different area attractive to them with sugar water? Wear red,they won't be able to see you.

[veggiechicken]

Park your car the other way round so that you get out on the side away from the hedge!