~~~UPDATE~~~

These have been combined into a single mod: Whisper's (Un)Locked Power Armor Paints

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~~~YOU ONLY NEED THIS MOD IF YOU'RE RUNNING BOTH CONTRAPTIONS AND NUKA WORLD~~~

If you're running both Contraptions and Nuka World, you will find yourself with two recipes for the Sugar Bombs paint job on your T-51 Power Armor.

The reason is that Nuka World has a copy of the Sugar Bombs paint job from the Contraptions DLC. This mod removes that copy.
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Note:

The Power Armor Paint Crafting Fix will also remove the extra Sugar Bombs paint job. It does other things as well, which you might find more useful than the "one trick pony" which is this mod.
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In modding terms:

There is a constructible object (co_DLC04_PA_Material_Placeholder) in the Nuka World DLC. This is the duplicated Sugar Bombs paint job.

This tiny little mod (literally only 240 bytes!) tells the above constructible object to not create anything. That removes the duplicate paint option from the PA station while having minimal effect upon your game.
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F.A.Q.

Q: Your mod broke my game!
A: Uninstall this mod and revert to an earlier save.

Q: I've already painted some T-51 with the Sugar Bombs paint job...what if I put the wrong version on? What will this mod do to that?
A: If you've painted it with the Nuka World version it will still stay on your T-51 suit. In the PA station it'll look odd, not registering as having a paint job (see the pictures). Just repaint it with the version visible in the station - that'll be the correct (Contraptions) version.
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Honorable Mentions / Inspiration / Help

ImmortalAbsol - for asking "have you thought of" and "how about". Thanks for the nudges and ideas!