TSP (Trisodium Phosphate) is an optional step to further clean your parts. It is an alkaline cleaner and must be kept away from mucus membranes and skin. Use gloves to handle the parts during the TSP bath.
This step is referenced in Powder Coating Basics.
I made this at TechShop Detroit (www.techshop.ws).
Step 1: Fill a Utility Sink With Enough Water for a Parts Bath
Use your shop sink or other heavy duty option.
Step 2: Add TSP
Sprinkle the TSP in using a few shakes. A significant amount is not required as you can see in the picture.
Step 3: Put Components Into Bath
Once the TSP is dissolved, put your components into the bath.
Step 4: Shake Around Components
Using gloves, swish around your component to make sure each surface is completely soaked.
Step 5: Lay Out to Dry
Take your components out and lay them out in a safe place to dry. I just used the other sink.