What step typically precedes basecoat in the refinishing sequence?

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Sealing the surface first creates a uniform, barrier layer that blocks stains, controls porosity, and provides a good foundation for the color coat to adhere to. When a sealer is used, applying it before the basecoat helps the basecoat lay down evenly and prevents issues like bleed-through or uneven color. After sealing, you typically let it flash off or dry so solvents escape before the basecoat is applied. If the part already has a sealed or primered surface, a separate sealer may not be needed, but the sequence still centers on preparing the surface before color. The other steps listed don’t fit as the direct pre-basecoat step: basecoat comes after sealing and flashing, curing happens later, and flash/dry is a sub-step that follows sealer rather than replacing it.