I am a firm believer in Nu Finish (polymer, not a wax). I use it on all fiberglass, plastic, and decals and have for years with great results. Easy on/off.
Steve
Steve Rinker
Rochester, NY
2013 Keystone Sydney 340FBH 5th Wheel, 12,280 lbs loaded (scale)
2015.5 GMC Sierra Denali 3500, SRW, Duramax, CC, Payload 3,700 (sticker- not scaled yet)
Take my posts for what they are, opinions based on my own experiences.