Pretty sure they simply re-sell B&B blending products, like other detailing companies. So you'd only be able to critize CGs for branding, advertising, pricing, customer service, etc, not the actual products. All B&B blending products are good, so GC's labeled stuff will be good.
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/// 2004 Silvergrey M3 · Coupe · 6MT · Slicktop · zero options
/// 2011 Jerez/Bamboo E90 M3 · DCT · Slicktop · IG: @na.s54
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