Speedliner is considered the tops, but it is by far the most expensive option and is best done by those that know what they are doing.
Protectakote is ok, easy to do DIY but is nothing like as hardwaring as Speedliner.
There is a third option, which is the one I took.
Prior to speedliner, the method considered the best was Fibreglass.
As Tosh said I go my kit off Peter fogwill...I think it was around about the £100 ,mark.
Easy enough to do DIY and it is VERY hardwaring.
Downside of it is that using fibreglass is real messy and the stink has to be believed, your van will pong of the bloody stuff for weeks (I got to quite like it

)
I'd sure as heck recommend it though.
Ian.
PS,
Ask Tosh who was the one who'd open the door to see if it was time to finish...and who also crawled off court with 5 minutes still to go...was it the short, fat, 50 year old with knackered knees, or the Jap guy 15 years his junior ?
