Whats the best treatment for chassis?

Hi there, just wondering if anyone has any good tips for keeping the landy chassis from rusting away below me, I have just fitted a new rear crossmember and a front outrigger to my 90 and was going to give it a coat of waxoil, heard somewhere that mixing waxoil with a bit of spent oil is better, any ideas?

Reet then there's bin a lot of talk on this so try a search fost. I've just taken the body off my 90 and had a look at the chassis which I've done with a waxoil type thing twice in 18 months (can't remember the name but it's a well known one) and it's got loads of surface rust. The thing is after getting it clarted up with ****e I get a bit trigger happy with the pressure washer and reckon thats why waxoil stuff int any good, so I'm off to do it with a Shutz type stuff and try not to be so enthusiastic with the pressure washer.

Thanks for the reply, its hard to know whether the stuff is any good or whether it just needs putting on properly and as you say, and not washed off or whatever. Mine had loads of waxoil on but some places it had ****loads of rust under it or it had flaked of and rusted!

You can thin waxoyl type rustproofers with 10-20% engine oil but don't use old oil from the sump...it's got all sorts of nasty stuff in it. If you don't thin it down it tends to gather into balls inside the chassis,no good at all.