I worked on over the road semi trucks for years and corrosion is always an issue. Removing corrosion and paint off your ground is paramount to good electrical conductivity but you must reseal it from further corrosion. That being said I always would apply new paint over the area after making the ground connection. A lot of paint. Leave no where for water or air to get at it your bare metal connection and ruin it. Problem solved.
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2008 LR GT. Sport and Premium Packages. Little Lunati Plus, BTR dual springs, Straub bushing trunions. Spectre CAI, Camaro trans pan, Stainless long tubes, no cats, Magnaflow mid muffler, Solo axle back, Eibachs, 6th gen 'Maro' 20's in gloss black, Shark fin, LED interior lights, brake lights, headlights, foglights, 20% ceramic film tint.
13.199 @ 105 1/12/2018 WHP