RE: how to cover in sran wrap?
a glue stick also works rather well. run the glue stick along all the edges and across the ribs you want the saran to stick to. lay the saran on as neat as possible and run your finger over where the saran is on the glue, if you can use something warm here it makes it stick better otherwise just run your finger back and forth several times to help warm the glue. trim with a razor blade, I shrink mine in front of a small heater controlling the heat by the distance you have the part from the heater. a blow drier or heat gun ussually has too much force to allow drum tight shrinking.
a plus to the glue stick is if you are not all ready using 3m-77 for something then you don't have to shell out 7 to 9 dollars for a can of it, and the glue stick doesn't get on everthing like the 77 does when you spray it.
hope this helps.
Jason