Hi Sue, that sounds like calcium from hard water. The best I've found for mine is vinegar and elbow grease. If its crazy bad fill a plastic baggie with vinegar and tie it around the faucet so it can soak.
Probably lime from your water. I put vinegar on a rag and drape it over the faucet near the sink...leave it over night and should be easy to remove the "white stuff". For the end of the faucet....take a plastic sandwich bag and fill with vinegar. Put it on the faucet with the end of the faucet in the bag and use a rubber band to hold the bag on the faucet end. By morning, it should be easy to wipe the lime off.
White cleaning vinegar should clean it.