boiler suit! I know it sounds mad but pickles got an infctious respiratory infection and vet said If I want to groom him will have to wear boiler suit and rubber gloves (good look I know!)
in diy stores you will actually find paper ones which may be a better idea cuase you could then throw them away or burn them after use..i think they are called painting overalls
There are particular shops that sell overalls, warehouse coats, boilersuits etc, all manner of work wear. Just look in your local telephone directory or search on the internet.