If your kicks look dull after polish, you’re prob messing up in one of these ways:
Too much polish. You cake it on, it clogs the pores. Thin layers, always.
Dirty base. Polishing over dust = sealing the dirt in. Wipe first, polish after.
Wrong brush/cloth. Use horsehair brush or soft cloth. Old socks ain’t it.
Skipping buffing. Polish needs friction to shine. Brush till you see that glow.
PU/faux leather. Bro, no polish will save plastic. It just smears.
Better gget back to polishing again my guy