To undercoat or not undercoat the GEN4

Grima wrote: HI,Tetrosyl Schutz Underseal is it any good?

As long as it is going over clean treated surfaces it is as good as anything. If it is going over rust it forms a nice cosmetic skin, but on a new car it will thicken up the factory sealer. I've sprayed many an old car with tetroseal, and they still rust away beneath it, whether they rust faster or slower than without it is anyone's guess.

The dinitrol black wax is supposed to be self healing, inhibit rust, water resistant, and generally better- but they would say that as it is twice the price.

I dinitrol'd my Gen 4, with a kit, I was a bit disappointed that the stonechip to do under the wheelarches seems to have been replaced by underbody wax- maybe it is better, or more likely cheaper.

Sorry I'm thick, does that mean you can't underseal the wheel arches because there waxed?

No, I mean the kit I bought from Dinitrol this year only had cavity wax and black underbody wax. The kit I bought 8 years ago to do the Gen 3 came with cavity wax, underbody wax and stonechip for the wheelarches.

The wheelarches on the Gen 4 are factory finished with paint over some sort of sealer or stonechip, you can spray what you like onto them.

Panic over. OK here's the deal, the garage said as it's a new car (4 weeks old) a simple job of clean dry spray. Tetrosyl Schutz Underseal, clear or black (black lasts longer?) cost £120 including vat, a 2 day job. your thoughts.

If you can get real hammerite waxoyle it will last longer than the tetraseal stuff, it goes on better too. Obviously because of keeping environmentally anxious types under control none of these products actually work like they used to but for the budget conscious the hammerite isn't bad just expect high wear areas to only last a year between top ups.

In response to those who say don't bother as you'll not see the rewards, please do as in about 10-15 years I might be its custodian and I'd quite like it not to be rusty.

Thank you!

Kirkynut