What is the key functional difference between basecoat and clearcoat?

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The main idea is that color comes from the pigmented layer, while the clear top layer provides shine and protection. Basecoat contains the pigment that determines the color, and clearcoat goes over it as a transparent layer to seal the color, add gloss and depth, and protect the finish from UV light, chemicals, and wear. Without basecoat, there’d be no color; without clearcoat, the color would look flat and fade faster because there’s no protective, glossy top layer. Some options mix up color with protection or focus on drying rate or solvent type, but the defining difference is color from the basecoat and gloss/protection from the clearcoat.