Whatever you use on your tires will probably work well for the hoses and plastic parts under the hood. 
ozchevy said:Hi guys,
I gave my Fan shroud the flick, as it was too badly damaged. It looked at some stage as though the fan had actually hit it.
So - I made a new one.
Can't buy one here in Australia, and ebay from the U.S would have cost a fortune in shipping charges.
http://img.photobucket.com/albums/v291/ozchevy/Z_28Camaro-42.jpg
http://img.photobucket.com/albums/v291/ozchevy/Z_28Camaro-5.jpg