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Step 1: Take off the landing gear
To do the power coating, you need to get some TSP cleaner, acetone and nitrile rubber gloves in addition to somewhere you can powder coat.
Step 2: Sandblast the part
To start with, you need to prepare the part in the sand blasting cabinet. Put the part in the cabinet. Be sure to go over all the edges of the part. When you think your finished, check the part and clean up any places that were missed.