There is a confectioners glaze thinner by CK, and i use it to clean my bowl and brushes, then i start using paper cups with cheap brushes) As for substitute, just diluted corn syrup will give shine but will take quite a time to dry up, many suggest using corn syrup with alcohol together and for me that worked great on the details on the cake, however I dont think I would use it on flowers, as sometimes it still stays a little sticky.
RoseDreamCakes
