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Knurled.
Knurled. MegaDork
11/25/19 5:31 p.m.

Cool!

 

Epoxying aluminum is a royal pain because of the oxide layer.  Getting some "tooth" for mechanical interlocking is the only route to success.

captdownshift
captdownshift UltimaDork
11/25/19 7:20 p.m.

I hope that you didn't get any on your hootus. 

OHSCrifle
OHSCrifle SuperDork
11/25/19 8:26 p.m.

I'm with Dean. Not Pecora but Dow Corning 795 silicone sealant has been used to hang glass off of aluminum extrusions and last for decades.
 

Fill a groove with it or cut it with a knife. Best to just tool it before it cures. Stays slightly pliable. I don't think sanding is an option. Note: it'll probably take a specific primer to bond properly. 
 

http://www.siliconeconcepts.com/Category%20Data/Dow%20Corning/Structural%20Sealants/795%20(New).pdf

 

edit: re read your OP. Silicone can't be painted. But it is available in a lot of colors. 

BigD
BigD HalfDork
11/25/19 9:32 p.m.
captdownshift said:

I hope that you didn't get any on your hootus. 

And if I did?

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