
Chalk is a useful cleaning tool when used properly. Sometimes it appears not to work instantly but over days, It seems to release the dirt from the coat. Only thing you have to watch with chalk as it does seem to colour the coat ( in white coats) is allowed to get wet.
I stopped using it all together due to this reason as I used to always chalk when I hand stripped.
My preference now is is Corn starch (
NOT corn flour) I don't like baby powder as it is also calcium carbonate , but Johnsons do a Calming Lavender & Chamomile
one that is NOT chalk calcium carbonate but Zea Mays which is pure corn starch, this is excellent for coat cleaning.
Here is the details you will have seen it on the shelf. Please note though this is the only product avaliable in the UK from Johnsons that is Corn starch the others are talc/calcium carbonate.
http://www.johnsonsbaby.com/product.do?id=44