[2bikebill]

Yes it's good stuff. I got some last winter when I realised the bike was slowly dissolving in the garage. It works but it's mucky. I prefer taking a shiny dry bike out of the bag at the end of winter.
The Vac bags work brilliantly. A little bit awkward getting the bike in (I suspended the bag from a rafter and legged it in) and it's hard to get it onto the centre stand once it's in - I might just leave it on the side stand this time. There's a bag of dessicant to put underneath and a humidity indicator to put on the seat. Bike comes out bone dry.
Not as cheap as ACF50 I know, but for less than fifty quid well worth it just for the peace of mind.
The name's a bit of a misnomer, you don't have to suck the air out, just squeeze out the excess and seal it with a cable tie.

[barenekd]

I think I may have to run by Aircraft Spruce and pick some of this stuff up. Sounds great!
My GB is definitely in need.
Bare