Late reply but I'm going to do this in the next couple of weeks, weather permitting. I'm going to use Dynax UB (the harder brown wax) for behind the liners and and non-visible areas and UC for the rest.
You're right about a Lanoguard, most favourable 'reviews' are sponsored or just astroturfing, and that they recommend applying it every 6 months tells me that it's not very durable.