Re-painting pedal knobs to custom colors

jbrrrr

New member
Hi all - I didn't see any threads discussing this particularly so I wanted to put the feelers out to see if anyone has gone down this path before.

I'm in the process of putting together a pedal in an enclosure that I've finished, and thinking that it'd be rad if I could find knobs in a specific 60's avocado green - and based on what I've found available, there's maybe one or two shades of each color available at best and that's all you've got to pick from. I've been thinking about buying a small stash of simple plastic knobs with set screws, something with the indicator line actually recessed into the knob, and re-painting them myself to fit whatever I'm building at the moment. My first thought was just buying whatever Krylon color seemed to fit whatever I was aiming for, and then I realized I could potentially be buying a lot of cans of colors I'm not using all that often, so my next thought was a to invest in a modest airbrush rig, and mix the colors myself.

I'm not entirely sure, but I think with airbrushing, it'd be better to spray primer first and then re-paint them, and obviously remove the set screw beforehand - but has anyone done much of this? Any advice on paints that work better than others, clear coating, or whether it's way too difficult to end up with a clean looking knob at the end of it.

Ultimately, if I can end up with a finished knob that looks 90% like it may have come from the factory that way, I'd be satisfied regardless of the extra work involved.

Thanks in advance for any advice you can share on this.
 
I think you may be chasing your own tail here. Why not buy knobs close to the color you want to use and try to match your enclosure to the knob rather than the other way around? I can almost guarantee it’ll be easier to do it that way than what you’re proposing.
 
I think you may be chasing your own tail here. Why not buy knobs close to the color you want to use and try to match your enclosure to the knob rather than the other way around? I can almost guarantee it’ll be easier to do it that way than what you’re proposing.

I'm sure it would be, and I know it probably sounds unnecessarily complex, but I've started finishing enclosures by wrapping them in old fabric scraps instead of painting them, and since I'm not making them at scale, each one is kind of a unique thing. It'd be great if I wasn't stuck between the one or two available variations of the color that I'd like to use.

It may be less work in the end to try resin casting the knobs from scratch, which I'm not opposed to either.
 
Casting appears to be a lot more practical. Sounds kind of fun

 
I'd say casting is gonna be more durable.
If you have the ability to make the molds then it is pretty easy.
If you want set screws you'll need to be able to drill and tap threads for those.

I enjoy casting knobs. You can really get a lot of different variations of colors.View attachment 82941

Does your mould have a fill for a pot shaft or do you drill them afterwards? This might be a nice tutorial by the way... :)

I always liked this guy's work (swedenknobs).

 
I used to powdercoat metal knobs to get different colors. It was a huge pain to do and the amount of time it took to get good results was not worth the results, especially when I can buy so many different colored knobs off the shelf.
 
Does your mould have a fill for a pot shaft or do you drill them afterwards? This might be a nice tutorial by the way... :)

I always liked this guy's work (swedenknobs).

I make 2 part molds so it has the shaft included. I also mount brass inserts in the mold when I cast so it gets cast into the knob.

I use jigs and a CNC or drill press to drill and tap the holes.

I've seen some of swedenknobs products on reverb. They do a great job! I have some of their knobs in my watch list.

IMG_5191.jpeg

IMG_5190.jpeg
And here is the casting corner
IMG_5192.jpeg
 
I’ve tried painting knobs in the past, using automotive (catalyzed) clear coats, and they still did not wear well, so I’m willing to compromise.
 
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