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Spraying gelcoat with a Preval aerosol sprayer requires specific preparation to avoid nozzle clogging and poor finish quality. Use laminating (non-waxed) gelcoat rather than finishing (waxed) gelcoat, as the propellant in the sprayer cools the canister significantly, causing wax to solidify and jam the nozzle.8:54 Thin the gelcoat with a non-reactive reducer like styrene rather than reactive thinners like Patch Aid or Duratec, which can cause blistering if used below the waterline.4:55 Limit reduction to approximately 5% to 15% to maintain pigment concentration and avoid translucency.11:27 Because these sprayers deliver a thin film, apply multiple light coats to achieve sufficient build for wet sanding and buffing.16:04 A single Preval canister typically covers an area of roughly one square foot before the propellant or nozzle performance degrades.16:24 These sprayers are best suited for repairs roughly the size of a basketball.16:56

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