Originally posted by Karl
theres something called Killz ( I think )
Kilz is a brand of primer sold in much of the U.S. Kilz is advertised as a product that you can apply over oil-based or latex finishes as a stain sealer and paint primer (actually there are several brands that do the same thing). It was originally in liquid or 'paint' form, and had to be brushed on. When dry, it has a white color and has a pretty smooth finish due to a lot of added filler material in the mix. The original formula was alcohol-based (or something like that, it had to be used in a WELL ventilated room) and was a b***h to clean the brushes up afterward.
The newer versions of Kilz are water-based and clean up easier, and somehow still provide a 'seal' over other latex-based finishes, but that's all beside the point.
The stuff these guys are using for rocket primer is the spray-can version. It is still mainly a stain sealer and paint primer. I would be willing to bet that someone on your side of the pond is selling a directly equivalent product. Ask at your local paint store, they can probably suggest something suitable.
At any rate, aerosol products are among the big no-no's for sending on an airplane here in the U.S. Definitely forbidden in carry-on, and I believe also forbidden in cargo. Sorry.