i think meindl sportwax is made by grangers.
bbf - proper wax is the stuff you smear on. i always treat new boots with the proper stuff first (nikwax/granders/meindl wax in a tin/jar as tehy are all much of the same thing). applied with a wet cloth (so the wax goes on the boot and not into the cloth) with particular attention to all seams. hairdrier the wax into the seams. allow wax to dry for at least 48 hours and give a buff up. (i usually then apply shoe polish over the top, again applied with a wet cloth, in a circular motion until it buffs up)
nikwax aqueous stuff gets applied after boot cleaning on areas that do not dry in about 20mins i.e. the water has soaked into the leather rather than just making the surface wet. these areas are usually the forefoot crease and anywhere else the boot bends a lot. applying all over where it doesn't need it is a waste because it just rubs off again on the nearest pirece of grass.
a "proper" waxing is neeed when the wet bits get a bit too widespread i.e. large areas don't dry within about 20 mins.
too much "proper" wax just ends up killing your boots with kindness as it will make the leather soft eventually where you don't want it to be.
i always like clean looked after boots. i don't care what they look like e.g. once in its life this was nubuck/suede/pterosaur. after all, they are one of the most expensive things you'll buy and the only thing you buy you absolutely rely on. so look after them.
the only thing to look out for on meindl boots is where the lace eyelets/rings bend on the forefoot. meindl boots are designed so that these dig into my forefoot giving me bruises. shame as the borneos are fabulous boots. an expensive lesson learnt although i do have meindl boots (can't remermber which) where this doesn't happen.
should something fall apart and they get arsey about what particular product you've been usuing on them doesn't really bother me. i write the experience off to back luck and never purchase anything of their brand again.