Hope you got your answer, but me and a buddy clear coated a wood surfboard he built. That is, over the epoxy-glass. Worked fantastic. Tricks I've learned are: 1)-use a respirator 2)-its a mechanical connection between the rudder and the clear, so you must sand down to give it "tooth" and get rid of oxidation. 600grit should be fine for spraying. 3) wash the rudders/object before sanding with Dawn dish soap and water, wet sand, wash again, wipe with paint degreaser/dewaxer, then shoot the clear.
Guessing you've shot paint before, so basically clean the rudders to get any grease/wax, etc. Off before you sand or you might get get fish eyes in your clear.
It'll always sand out...
_________________ ChuckC H21SE- 408
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