I think I'll be using it permanently after each wash.
That's what I was thinking of doing. Currently after each wash I quickly do a couple of panels each time on a rotational basis with Triplewax Fast-wax stuff, which works really well, brings up the paint nice and glossy and helps the water beading between washes. It's easy enough to apply but BSD looks like it could be a cracking alternative. So it's just wipe on, wipe off? And can it be applied to panels which aren't completely dry yet?
Ta.