Primed the skeleton of the vertical stabilizer and the skeleton of the rudder. I used alumiprep 33 and alodine 1201 to prepare the parts. The alumiprep was applied diluted 50/50 with water. It was scrubbed in with a green scotchbrite pad. The alodine 1201 was applied full strength and was apllied with a paint brush. The Primer used was Sherwin Williams P60G2 and it was diluted with 47K44 reducer 2 parts reducer to one part primer.