GEN 4 Jimny undersealing wearing off

It looks like it has been jetwashed off :ohmy:

I did mine with 4941, next year I'll jetwash under the wheelarches and do it again.

I was initially disappointed with the kit, which was 1000 for inside the cavities and 4941 for outside- the kit I bought 10 years ago for the Gen 3 had cavity wax, black wax and a stonechip type paint for the wheelarches.

However, everybody and his dog recommend Dinitrol, so I assumed they know what is best, and the Gen 3 got to 19 without any chassis corrosion, or needing welding on the shell.

If you read the data sheet for 4941, it doesn't harm any existing surface finish, which makes me think it doesn't actually bond to the surface.

I never jetwash under my cars, just use the hosepipe.

It looks like they either didn't do much or most of it has peeled and dropped off.

It's like it was sprayed with a rattle can paint, which I'm sure it wasn't.

Kirkynut

Was it a company that is based in rugby?

Dinatrol as a product is good, but I can't say it's any better than others on the market. I have used most in the past and now have a mix of makes/products depending upon the area to be treated. Like with most finishing preparation is the key to how long the finish lasts, never had any wax finish myself that has been removed by a jet wash.

Soeley wrote: All that sounds good then. I paid £650 +VAT.
Had mine 3 days.
1st to power wash and steam clean, then dry over night
2nd to apply first thin clear coat wax
3rd to apply outer harder wearing black wax
As per recommended on the Dinatrol website.

It's step 1 I have the most problem with when firms apply wax. When I have done my own it takes a minimum of 7 days (UK temperatures) in my opinion for a cleaned underside to be totally free from water. Not just talking about the surface, I want all the box sections and seams to be totally dry before the wax is applied. That's why I do my own, nothing to do with cost.

Did your vehicle have any silicon "shine for life" dealer paint treatments that could explain the wax peeling as it has? Very odd, never seen that before, it's usually a pain to remove.
Mike

That's a very good question Mike. I would have said there was no serious rust proofing as applied by Suzuki (there were fairly random looking sections of what looked like Suzuki underseal, painted white) but most looked like white painted bare metal. However the technician at the garage yesterday when I was discussing this with him mentioned something about some kind of overall coating applied by Suzuki that maybe was on there but which I never noticed as being dissimilar to conventional looking underseal. Something must explain the peeling. I don't think the applying firm would cut corners (lots of good reviews) so something odd going on.
Having said that, if it were normal for these Gen 4 Jimnys to have that finish then such issues would be more prevalent?
Micheal
PS in answer to another enquiry, no it was not done in Rugby.

Got the car back today after a full strip down of previous underseal and high pressure steam clean/dry. Two applications of primer and wax applied. Double application of cavity wax. Hard Wax applied.
Looks good (can't see how to add photos). However the shop advised against using pressure washer hose to clean mud off the underside. They did the work for free and without any quibble. Preserve and Protect, Johnstone, Paisley. They have a good reputation.