Author Topic: Refinishing Tank Emblems.  (Read 1130 times)

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Offline Ace Blackwell

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Refinishing Tank Emblems.
« on: February 15, 2016, 08:02:47 PM »
All,
 
I am putting this out there for anyone interested in redoing their tank emblems.  Couple things to remember, 1) This isn’t the best approach is you are looking for showroom / original restoration type emblems.  Due to light sanding of the gold color, you can’t restrip and return to original condition.   2) The raised aspect of the letters is covered unlike the original condition of only the background being black.  While mine aren’t perfect, they are a lot better than when I started.  It wasn’t too hard and didn’t take too long, outside of waiting on paint to dry.

I looked around the net and I couldn’t find anything for the raised gold emblems with black back ground.  I found plenty for the white inlaid style emblems.   In any case I decided to see what I could do.  I don’t have the hand eye coordination to create a tape mask or to hand paint only the  background area.  I opted to paint them completely black and sand the letter tops to aluminum.  I guess you could use this technique and “wipe” the top but I was afraid the solvent would run and I would never be able to keep it out of the painted area.

After removing from the emblems from the tank, and stripping with air craft remover,
- Clean them with soapy water and then alcohol. 
- Paint gloss black. I originally tried flat black but with a gloss clear coat. It left the background gray in sun light.  * Note paint from multiple angles to better fill in the raised areas. 
- Once dry, secure 400 grit sand paper on flat surface (I just held by hand).  Lightly rub the emblem on the sand paper surface until the paint is removed.
- Suggestion - Stay in one direction to prevent "cross grain" appearance. 
- Observation, Using a flat surface helps prevent contact with background better than holding paper in hand.  You may need to do some minimal hand sanding to get areas like the interior edges of the “O” and ”D”. 
- When sanding, roll the emblems to get outer edges of the letters.  To prevent excessive aluminum removal, I wouldn't recommend using a mechanical sander but that's your call
- After the tops are clean of paint take 2500 grit and very lightly and fast, polish. Again stay in one direction.
- Once the tops are shining and most all of the previous sand marks are gone, cleaned emblems again with soapy water with a hot water rinse to make sure the dust and aluminum is gone.  I may have also wipe with alcohol though I’m can't remember. 
- Spray a couple of coats of clear coat from rattle a can and let dry.

Mine didn’t turn out too bad.  Has kind of a brushed aluminum look.  It even took out the impact gouges I had in one of the emblems.   Again I stress, it will remove the original gold coating and the aluminum look will have some slight imperfections if looked at too long but if you aren’t one to let best stand in the way of better, it’s a rattle can low budget improvement. 

Looking back you could probably use the same approach with a damp mineral spirits cloth on a flat surface and not remove the gold coating.  Just a thought

Take it for what it's worth.

Ace
« Last Edit: February 16, 2016, 04:54:58 AM by Ace Blackwell »
1977 CB550F Work in Progress

Offline evanphi

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Re: Refinishing Tank Emblems.
« Reply #1 on: February 16, 2016, 06:28:02 AM »
NICE! Good looking results.
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline Chachi

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Re: Refinishing Tank Emblems.
« Reply #2 on: February 16, 2016, 09:26:19 AM »
What's the best way to remove emblems? Never done it and may need to.
73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1

Offline Ace Blackwell

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Re: Refinishing Tank Emblems.
« Reply #3 on: February 16, 2016, 04:19:38 PM »
Thx Evan, I appreciate it.

Chachi,  Mine just pry off. I used a small flat head screw driver as my tank was in rough shape.  Might want to consider something like a plastic bone knife or plastic thicker putty knife if your tank is in good shape paint wise.   

I'm including a few pictures to let you seen what they look like off.  Assuming you have the same type.

Good Luck

Ace

1977 CB550F Work in Progress

Offline beemerbum

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Re: Refinishing Tank Emblems.
« Reply #4 on: February 16, 2016, 06:46:29 PM »
What's the best way to reattach if one or both the little pins are broken and missing?

Offline Flatlander80

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Re: Refinishing Tank Emblems.
« Reply #5 on: February 16, 2016, 06:54:39 PM »
I did almost the same thing with my tank emblems. I used a higher grit sandpaper (1000 I think), and got a great antiqued look.
Before:
 

During:


Finished:



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Offline Airborne 82nd

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Re: Refinishing Tank Emblems.
« Reply #6 on: February 16, 2016, 07:11:27 PM »
What's the best way to remove emblems? Never done it and may need to.
Chaci If they are glued on Fishing line works great better to warm with hair dryer first.

Offline RAFster122s

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Re: Refinishing Tank Emblems.
« Reply #7 on: February 16, 2016, 07:20:14 PM »
Beemerbum, any solution has to not have a blobb of glue at the base of the emblem or it wil not cinch up tight to the tank causing an unsightly gap. The mstal is often an aluminum alloy and the part is small enough to require micro welding. So, we could enlist the skills of the microwelder whom is also an SOHC4 member.
He also has built a nice turbo bike...
Because it is so small the typical gluing methods are not successful and TIG welding of a small spot is normally beyoud the skills of most welders.

David
David- back in the desert SW!

Offline RAFster122s

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Re: Refinishing Tank Emblems.
« Reply #8 on: February 16, 2016, 07:31:31 PM »
The Spectra line (kevlar) like spiderwire and similar are handy to do this as they are super strong line...just wrap and tie off the line to a piece of 3/8"dowel so you aren't cutting into your fingers with the line. A drop of superglue on the knot is advised since the knot is likely to come undone.
David
David- back in the desert SW!

Offline Ace Blackwell

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Re: Refinishing Tank Emblems.
« Reply #9 on: February 16, 2016, 07:48:28 PM »
Flatlander,   NICE. Those turned out pretty sweet.
1977 CB550F Work in Progress

Offline Chachi

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Re: Refinishing Tank Emblems.
« Reply #10 on: February 17, 2016, 06:03:46 PM »
Thanks for the info. 73 750 K3 - any idea if that year had pins or were glued?
73 CB750 K3
72 CB500 K1 - Sold
75 MR50 Elsinore K1