Roughen the surface with a file before you apply the glue.
Her hands were roughened by years of hard work.
Age caused his skin to roughen.
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To address this, Fraunhofer FEP developed a plasma treatment process that roughens the ETFE film substrate at the nanoscale, dramatically improving adhesion for long-term use.—Atharva Gosavi, Interesting Engineering, 2 Sep. 2025 According to the Mayo Clinic, veneers are one of the most common cosmetic dentistry treatments, and doctors put them in place by permanently removing some enamel from a person's natural teeth to roughen the teeth surfaces and help veneers stay in place.—Charlotte Phillipp, People.com, 9 June 2025 According to Meriem, friction from certain hijab fabrics can roughen the hair shaft, while heat-trapping materials cause buildup, inflammation, and even ingrown hairs—all of which silently impact overall hair health.—Eman Bare, Vogue, 19 May 2025 The lengths in particular, which are already dry and sensitive, are only roughened even more by regular shampooing.—Jana Ackermann, Glamour, 26 Nov. 2024 Test sample: Low-carbon steel joined to form a T. Surface and end roughened by grinding with 60-grit abrasive.—Roy Berendsohn, Popular Mechanics, 4 Aug. 2023 To try to remedy the situation, workers dragged tires and scrubbed the slick surface to try to roughen it up a bit.—Nathan Brown, The Indianapolis Star, 22 Apr. 2022 The optional mirror-bright 20-inch wheels look great but roughen the ride.—Dan Neil, WSJ, 3 Feb. 2022 To address both weaknesses, engineers coated the nitride film—a combination of GaN and InGaN layers—with a metal that acts as a mirror, then flipped the assembly over, removed the substrate, and roughened the underlying surface.—IEEE Spectrum, 30 Dec. 2010
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