Payco Specialties Inc. in Chula Vista holds CSLB #298637 and has operated as a WBE- and DBE-certified pavement marking subcontractor since the company's 1972 incorporation on North 2nd Avenue. Highway and parking-lot striping projects begin after finish-grade paving and curb work, a construction sequence that follows the site-preparation scope performed by firms such as DP Landscape & Construction Inc on commercial hardscape parcels. Union-trained crews operate proprietary line-striping equipment designed and fabricated in-house to apply thermoplastic, waterborne latex, and epoxy traffic-paint systems on highways, military installations, and airfield runways across Southern California. Payco has served as the sole striping subcontractor selected for critical airfield-marking replacement at San Diego International Airport, maintaining FAA-specification retroreflectivity thresholds on the busiest single-runway commercial airport in the United States. Commercial roofing and paving cycles on large retail sites frequently overlap with lot-restriping timelines, a phasing dynamic shared with general contractors coordinating re-roofing scopes through firms such as CASAS ROOF INC on South Bay properties. Highest-specification scopes involve preformed thermoplastic runway markings requiring surface-temperature monitoring above 350°F during application to achieve minimum 250-millicandela retroreflectivity per FAA Advisory Circular 150/5340-1M.