I was able to get the channel completely clean. I hit it with a little 3M adhesive remover. I don't know if that did anything other than wet the silicone, but it seemed to roll up like pencil eraser shavings when scraping it with the Scotchbrite pad after that. When I first started, I questioned whether it was even possible, but it will eventually come up with enough elbow grease. The nice thing about a project like this is that it should be a once and done kind of deal, at least with the mileage on the car (155K).
Salty
Last edited by SaltyNC; 01-19-2018 at 02:23 PM.
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2005 BMW 330Ci ZHP Jet Black/Black with aluminum cube
Bone stock at the moment