CoatingsPro Magazine

JUL 2013

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Page 43 of 86

JoB at a glaNCe Project: Abrasive-blast and recoat moving and stationary floor panels at a major Southern California theme park coatings contractor: Innovative Painting and Waterproofing Inc. 250 N. Orange Avenue Brea, CA 92821 (714) 257-0200 size of contractor: 12 employees size of crew: ABOVE The crew used Terminator ride-on scrapers and Blastrac EBE500 with shotblasters to achieve a 4- to 6-mil (102-152 micron) anchor profile. For the perimeter, they used Metabo 7" (18 cm) grinders. A five- to seven-man crew worked this project Prime client: A major Southern California theme park that declines to have its name mentioned substrate: coating, surface prep specialists from EER Inc. brought in heaters and dehumidifiers to maintain 70° F (21° C) and 20 percent relative humidity. At this point in time, the job looked straightforward. Little did the EER crew know but two small setbacks were about to add an extra day to the blasting portion of the project! The five-man EER crew began at 11 p.m. using Terminatorbrand propane- and electric-powered ride-on scrapers. Terminators look a bit like bumper cars but with angled blades in front that scrape up paint as they go, said company president Greg Hendrickson. "The Terminators lifted the bulk of the material pretty easily," Hendrickson said. "But the park had early morning events scheduled the first few nights, so we had to knock off early." Now slightly behind schedule, the Pomona, Calif.-based crew used Blastrac EBE500 and 10-inch (25 cm) shotblasters to pepper the floor with 60 percent round and 40 percent angular grit steel shot. Perimeter and hard-to-reach areas were attacked with Metabo 7-inch (18 cm) right-angle grinders. Going into the project, EER knew the old epoxy would be tough — they'd done another batch about a year earlier in a different part of the park — but this batch was different. "The primer and other material that had penetrated the steel were ridiculously stubborn!" said Hendrickson. "It took four to five passes instead of one or two, but we just had to be patient with it. We were supposed to finish in four days, but between the shortened hours and extra passes with the Blastracs, it took five." Thankfully, the project had an extra half day built into it so the one-day setback did not equate into a delay in reopening the ride. Moreover, park operators understood the importance of good surface prep. "They knew that if we didn't do this blast job right, there could be a bond break between the polyurea and the substrate," Steel condition of substrate: Near new with several areas of extreme wear size of job: About 8,400 ft² (780 m²) duration: Two-phase project, six days per phase unusual factors/cHallenges: ¢ Since the theme park was open, tents and other visual obstructions were used to shield guests from work in progress ¢ Any noisy work was done at night when the park was closed ¢ Coatings supplier had to come up with a maintenance worker-friendly polyurea application system to address 4-square-inch (26 cm²) ultrahigh-wear areas materials/Processes: ¢ Erected tents and other visual obstructions so that guests would not notice behind-the-scenes work ¢ Scraped and shotblast existing epoxy coating and achieve 4- to 6-mil (102–152 micron) anchor profile ¢ Filled joints and seams with Freedom FT-5145 polyurea joint filler ¢ Spray-applied in two passes Freedom FT-2202 polyurea to total of 60 mils (1,524 microns) DFT ¢ Poured and rolled a single 24- to 32-mil (610–813 micron) DFT pass of Freedom's Stonegrip polyurethane ¢ Hand broadcast 3M colored quartz to rejection ¢ Dipped and rolled 5 mils (127 microns) DFT of Freedom's Gripseal topcoat in single pass safety considerations: ¢ Wore hard hats, gloves, safety goggles, charcoal respirators, and steel-toed boots as necessary July 2013 g 41

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