Generational JKUR

I drained /filled the coolant a couple weekends ago. In order to minimize the time and mess, I only drained the radiator and the lower radiator hose. Not too difficult to remove the air dam and get to the radiator stopcock, and remove the airbox to remove the lower radiator hose. Since there was no rust or particulates in the old coolant I decided not to flush the system. I got out almost 8 qts which was satisfactory, and minimal spillage.

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I wanted to address some superficial rust on the OEM rock rails, so I took one off and removed the plastic end caps and a lot of dirt and rust flakes came out.
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I’m removing as much rust as I can from the inside and plan to coat it with and Eastwood internal frame coating, then drill a few new drain holes and repaint the outside.

Anyone else done this?
 
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TRevs said:
I’m removing as much rust as I can from the inside and plan to coat it with and Eastwood internal frame coating, then drill a few new drain holes and repaint the outside.

Anyone else done this?
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Not me personally but I've seen many similar efforts on Youtube, Facebook, and various other Jeep Forums... some people even remove the end caps to allow for easier washing out. They sell long metal brushes that have a long handle/stick that can be chucked in a drill. I bet that would work well to scrub the inside out and get the majority of the flakes out. This would let the Eastwood coating to coat better...
 
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pc1p said:
Not me personally but I've seen many similar efforts on Youtube, Facebook, and various other Jeep Forums... some people even remove the end caps to allow for easier washing out. They sell long metal brushes that have a long handle/stick that can be chucked in a drill. I bet that would work well to scrub the inside out and get the majority of the flakes out. This would let the Eastwood coating to coat better...
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I ran a square aluminum rod down a few times, and pushed a wet cloth down with a pvc pipe a few times. I looked in with a cheap endoscope and I think i got most of the flakes. I’ll look into the brush; it’s difficult to get the top part where it gets narrow, but that has the least rust because it is above the moisture.
 
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