RAS43, be aware that there is a Flagship cleaner wax & a Flagship pure wax. Different products. A supplier that carries one may not carry the other as well.
There are loads of brands of cleaner waxes out there. Not so many pure waxes/protectants.
Personal preference here is to use 3M marine fiberglass cleaner wax first on lightly chalked areas followed by the Meguires Flagship wax. Have tried the Mrguires cleaner wax too but find the 3M product a little more aggressive & easier to remove stains & chalking.