If I were you, I would look into chemical guys citrus wash (along with your dg 901). The biggest role it could play for you is a wax/sealant remover. Its also a great super concentrated auto wash and I've found works beautifully when placed directly on tree sap and other stuff thats hard to get off. Also, Meguires ultimate compound and polish are great options if your can find them cheap. And, sry to betray AG, but Chemical Guys site sells some quality MF's and a pretty decent price. 4 star paint protection is great stuff, but duragloss 105 is a good cheap sealant that lasts and thier 501 (the marine line) is an awesome all-in-one thats also decently priced.