Mine came with complimentary ERPS and I can attest to the fact that it does not work...
Proof's in the pudding and my car has as much surface rust on the unpainted surfaces as my neighbor's 110 that doesn't have it fitted and he's is even a year older than mine.
I find the spray tin lanolin a bit watery (viscosity wise) and it washes off in the rain. Do you get a better application with the bucket and sprayer approach?
Nothing beats the old waxoil as in the UK, but Aussie heat would have the whole lot puddled on your drive way...
Cheers,
Lou

