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I've been using this for a few years and keeps the engine finish nice, clean and glossy for around four weeks, a little time consuming applying as it goes on with a sponge brush, but i love cleaning my bike so the 20 minutes it takes doesnt bother me.
Used Armor-All on my old RK for nine years, but have gone to Pig Spit on this new bike. It works well and isn't terribly expensive. Armor-All works fine if you spray on, let carrier (water) evaporate, then wipe with a towel. It leaves a fairly thick silicone coating that stays on for a while, but may attract dust more than Pig Spit.
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