Maybe there's some confusion here. Do not assume that the orange color is just some bleed or overspray that can be sanded off. It's swirled into the material. That's what I called catalyzed. Like Catalin radio cases.
If that orange could be sanded off, I'd have done that years ago. Remember, I've had this bass since the 1990's. I only came HERE recently.

Anyway, as I've mentioned, this pickguard is also WARPED, like my cranial matter, and resembles a Lays potato chip. Even if I filled the oversized screw-holes, sanded it and repainted it, it's too thick and rigid for even the screws to pull it flat.
I checked the thickness again, and it's like .143...which is massively thick for any pickguard. No flattening in it's future, I'm thinkin'.
TTYL...gotta go.
L7