Bongo Fury

Is this stuff any good?

http://www.rust.co.uk/dinitrol-6030-met ... r/p405032/

ie suitable for a small hole at rear of drivers side rear wheel arch.
or any other waterproof suggestions.

If you're not prepared to, or able to cut out the rot and weld in new steel I would advise using a chopped strand glass fibre paste as it is non porous

I believe this stuff to be Aluminium filled and non porous. different to the run of the mill

Clean it off, both sides if possible. Treat with a rust killer both sides, then filler pushed through and mushroom it both sides. then paint over inside and wax it.
Chopped fiber glass is just as good but will give a rougher finish.
If you wanted to paint over it you would need a polyester filler on top.
With the stuff you suggested you could get a paintable finish off that filler.

Thanks bongolia
my intention is to stave off the worm for a while until the big job is needed.
the top coat/ clear coat is knackered and powdering all across the van.
I'm looking for a respray next year or year after depending on number of factors.
apart from this currently no rust.
No problems in last 4 years of ownership.