Yeah - all-year-round bikers in the U.K. swear by it. Cover the bike in it in autumn, leave it on all winter - not washing the bike - and wash it off in spring. From what I remember, it actually 'switches off' rust by reacting with it and neutralising it chemically. It creeps too, so gets in all the nooks and crannies. It can be a bit of a faff to apply - aerosol is the best way - but if you were laying up the SCR over winter, you could just paint it on the exposed metal parts with a paintbrush. A little goes a long way too.
Hope it helps.
Ben