Ok so, what I ended up doing was putting 6 Texture objects on the part, setting the part as Reflectance 1, and having the grid lines be just the black and nothing inbetween the grid lines like Vonick said. If you are seeing this and have a problem that REQUIRES you to have a reflective material variant (such as needing a reflective material variant with a normal map that distorts the reflection) then this solution will not help, but if you need a simple overlay like I do, then this solution is for you.
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