Hi Tony, check out this URL. No expensive gear required at all. To do it you may not have to bag the whole deck. You could probably tape the bagging to the bottom and top of the deck and get an airtight seal.
John K

: I have made magnetic flush hatches for my CH16, and I have read in past posts
: that if you do not put a layer of fibreglass over the magnets they will
: rust.
: My idea to stop this, is to put a layer of glass over the magnets but i need
: the layer to be as thin as possible so I thought vacumn bagging would
: achieve this but getting a pump and attachments in New Zealand(where I
: live)is extremely expensive so I am wanting to know if anybody has built a
: vacumn bagging setup at home and if so would you like to impart your
: knowledge to one how knows nothing.

: Thanks for any help provided

: Tony