[R-390] Knob painting question

[b w]

Hey Barry (III)

My guess is that a roughed surface would hold the primer and paint 
better. I used to sand-tex metal for painting, such as motorcycle 
frames/gas tanks, cars, wrought iron, etc. Same principle. Sand-texing 
is what you see on the nonglare parts of rifle receiver sections.


the other other Barry, or the non-(III)

>I am in the (slow) process of refurbishing a couple of sets of knobs.  I
>have cleaned the old paint off and smoothed the surfaces with #320 and #400
>wet-or-dry paper and figured they were pretty much ready for powder coating.
>
>In the process of restoring some brass and other parts for my "new" Zenith
>T.O., I was using a cotton buffing wheel with jeweler's rouge as the
>polishing paste.  I wondered what this would do to the aluminum knobs so I
>gave it a shot.  Wow!  The surface really polishes up nicely.  I thought
>about giving them a coat of lacquer and letting them stay bright, but it
>gives them a "dime-store stereo knob" kind of look so I nixed that.
>
>My question is will buffing them prior to powder-coating be a bad thing?  In
>other words, will the coating be less likely to stick to the shinier
>surface?  If it will stick, then I think the polished surfaces will result
>in a much nicer looking knob.  Anyone tried this?
>
>73,
>
>Barry(III) - N4BUQ
>  
>