Powdercoat injection lines

Lots have. You have to be very careful you don't get sand inside the line (kills injectors), or under the nut (makes lines crack over time).
 
I sandblasted and painted mine, didn't powder coat though. Don't spray to much powder on the part of the nut the wrench slips on, it's already a tight fit. And i know powder oat is more durable than regular paint but I'm sure it'll still chip
 
I went to a local place (EPI plating) that does different types of bolt coatings, zinc plating, etc. I had a few bolts re coated as well. I took the lines to a different place to have media blasted first and it wasn’t cheap. I am very happy with the results.
 
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