This is a phenomenon that occasionally occurs when I'm organizing my armory: even after spraying on a matte topcoat, it remains shiny and glossy, almost as if it were glossy.
The arm in the photo is glossy, while the rest is properly matte.
Why does this happen when using the same spray?
Incidentally, the arm has been sprayed with matte topcoat three times.
If I could just get the whole thing to be glossy, it would be almost complete, but what should I do?

mysterious phenomenon | ganson's Gunpla works