I have red melon, Marlborough yellow, red panda, and had a royal yellow as well, all of which a completely clean of peppering on the body. The red melon, royal yellow & panda has some black in the fins which reveal them as a PB type but as you can see the bodies are clean of peppering. You can buy PB types free of peppering, you just have to buy 5"+ fish so you can see that they're clean.
The big issue with peppering is breeding non PB fish to PB fish.
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Red melon
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Marlb yellow
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Red melon & red panda
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My old Royal yellow, also a PB type