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A series of UV-protected coatings were prepared using cerium-oxide-functionalized oil fly ash (<i>f</i>-OFA-CeO₂) in waterborne polyurethane (WBPU) dispersions. Three monomers, namely, poly(tetramethyleneoxide glycol) (PTMG), polydimethylsiloxane-hydroxy terminated (PDMS) and 4,4-dicyclohexylmethane diisocyanate (H₁₂MDI), were used to pre-mix with <i>f</i>-OFA-CeO₂ separately, followed by the synthesis of WBPU/<i>f</i>-OFA-CeO₂ dispersions. The <i>f</i>-OFA-CeO₂ distribution and enrichment into any part (top/bottom/bulk) of the coating was strongly affected by the pre-mixing of <i>f</i>-OFA-CeO₂. The <i>f</i>-OFA-CeO₂ was densely distributed in the top, bottom and bulk when the <i>f</i>-OFA-CeO₂ was pre-mixed with PDMS, H₁₂MDI and PTMG, respectively. Only an <i>f</i>-OFA-CeO₂-enriched top surface showed excellent UV protection. The lowest UV-degraded exposed coating was found when the top surface of the coating was <i>f</i>-OFA-CeO₂-enriched.