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Recommend me - underbody treatment

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  • Recommend me - underbody treatment

    Lots of products out there for cleaning, rust removal and painting of vehicle underbody. Looking for real life recommendations. I have an old Pajero and just about finished finding and repairing rust... So next up is to clean and paint, just not sure what to use.

  • #2
    Raptor Liner.... 1,000,000%.... have a look at either my Dodge or XB thread here or my Mates Ute I did... this stuff is sooooooo easy to use & goes on so well giving great coverage & it's tuff as... it's the only thing I'll ever use from now on.
    Speed is just a question of money, how fast do you want to go

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    • #3
      Raptor is very expensive compared to other stuff, I use upol gravel Tex, same manufacturer as raptor but only about €10 per litre and 80% as good

      don’t get me wrong if I was doing a proper restoration I’d use raptor

      what Pajero is it out of curiosity? I’ve a mk1 swb myself

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      • #4
        DaveD have you ever used this product? Id be intrested in how it compares to raptor liner.

        https://www.ebay.co.uk/itm/324390313...gAAOSwnA9fvpE2

        The underbody protective coat went on almost like a black spray paint when applied with the compressor gun.
        Its gave a lovely even finish all around ,yet hit nothing,you could see every factory seem etc.

        I have used it underneath my S2000,DC2 , twincam and trooper and really rate the stuff.

        https://www.dinitroldirect.com/

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        • #5
          No... I've never tried that & to be honest I don't think I'll ever use anything other than Raptor going forward unless they stop making it or they change it so it's no longer as good.

          I know the Raptor stuff isn't the cheapest on the market, but for me protecting the underside is not something I'd ever want to skimp on... I want to do it once, do it right & never have to think about it again.
          Speed is just a question of money, how fast do you want to go

          Comment


          • #6
            Raptor is mighty stuff (and for what it is it's actually relatively cheap), but it's not the answer to every situation either. As a long term solution I think raptor is really only suitable for pristine surfaces like the underside of that cab you've just done. it's not someting to spray on the underside of a vehicle that's intact. if raptor is applied over dirt or rust or another coating that's not perfect then it can crack and take in moisture then hold it. like when powder coating goes bad.

            And like when powder coating goes bad it's really hard to remove raptor for repair work. the other issue with raptor is it dries hard. very hard so it can suffer a bit from stone chipping (and then the potential to trap moisture again. a good underseal should be softer than raptor. if money's no object I think raptor followed by some sort of softer schutz type coating would be the ultimate finish.

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            • #7
              Originally posted by JohnBoy View Post
              Raptor is mighty stuff (and for what it is it's actually relatively cheap), but it's not the answer to every situation either. As a long term solution I think raptor is really only suitable for pristine surfaces like the underside of that cab you've just done. it's not someting to spray on the underside of a vehicle that's intact. if raptor is applied over dirt or rust or another coating that's not perfect then it can crack and take in moisture then hold it. like when powder coating goes bad.

              And like when powder coating goes bad it's really hard to remove raptor for repair work. the other issue with raptor is it dries hard. very hard so it can suffer a bit from stone chipping (and then the potential to trap moisture again. a good underseal should be softer than raptor. if money's no object I think raptor followed by some sort of softer schutz type coating would be the ultimate finish.
              Glad I seen this. I had planned to use raptor on all 4 wheel arches on the ae86. I think I might go with something else now.

              The schutz stuff is probably the best for the wheel arches but supposedly horrible to work with.

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              • #8
                Thanks all. I'll look into those recommendations. DaveD_XB - have seen your threads; all very good work. S50-touring , the Pajero is a Mk 1 LWB passenger. A Japanese import, off the road for years.

                The underbody at present has very little paint or protection and plenty of surface rust. I will have to rub it all back as well as possible, prime and paint.

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                • #9
                  Originally posted by JohnBoy View Post
                  Raptor is mighty stuff (and for what it is it's actually relatively cheap), but it's not the answer to every situation either. As a long term solution I think raptor is really only suitable for pristine surfaces like the underside of that cab you've just done. it's not someting to spray on the underside of a vehicle that's intact. if raptor is applied over dirt or rust or another coating that's not perfect then it can crack and take in moisture then hold it. like when powder coating goes bad.

                  And like when powder coating goes bad it's really hard to remove raptor for repair work. the other issue with raptor is it dries hard. very hard so it can suffer a bit from stone chipping (and then the potential to trap moisture again. a good underseal should be softer than raptor. if money's no object I think raptor followed by some sort of softer schutz type coating would be the ultimate finish.
                  id echo this. Raptor is an awesome product, really really good and does not compare to Gravi-tex. theres a reason there is a price difference, and its not 80% as good.

                  However, i agree with JohnBoy - i completely stripped the underneath of my tmk2 escort competition car last year during lockdown and coated it in raptor.
                  I did this particularly FOR the reason it dries hard, so i can easily wash tons of mud off it with a power washer.
                  Downside to Raptor as Johnboy says, it dries hard and therefore does chip even though its as tough as it claims. im ok with this as i religiously after washing following a rally throw it up on the lift, mix up some Raptor and touch up all the impacts from rocks with a brush/roller.
                  Obviously this is not idea for a road car so keep that in mind
                  looking back now, I think that maybe, every now and again, I should have braked a little earlier

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                  • #10
                    I've no real experience of it on the road yet as none of my project are at that stage yet, but I can easily keep an eye on it as I like to inspect the underside of my cars on the hoist every few weeks anyway.
                    Speed is just a question of money, how fast do you want to go

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                    • #11
                      I had my car professionally coated with schults. It looked the business. But I think if I was to do it again I would just spray it with Waxoyl and check it every year. The schults has cracked at seams and then hid rust creeping underneath. Whereas with just Waxoyl it would be fairly obvious where you need to treat/ look at. So I don't know if there is one quick solution long term.
                      We all stood around in a circle naked, thrusting our clinched fists in the air screaming "Jap Power!!"

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                      • #12
                        I looked up Raptor and Gravitex and they both get good reviews. Waxoyl is not really for underneath as it's intended as a cavity wax. I'll probably use that too, after painting and sealing. Here is what I have to deal with. Underside actually looks worse in the pic that in reality (I hope!):
                        inner wing s.PNGunderneath s.PNG


                        You can see the inner wing has just a dusting of primer. The black paint looks to be overspray from factory. The underneath, where it is not rusty, appears to be just primer and there are a few areas that have a light coat of stonechip sprayed over with factory silver.

                        Any tips on how best to clean up the rust are welcome.

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                        • #13
                          Yeah Waxoyl is really for cavities, but regardless I have started using it underneath and just recoat the next year in any areas that have washed off. And the waxy mess kills any rust spots. And if I need to clean an area, it comes straight off with WD40. It's not a permanent solution, but the permanent solutions seem to have their own issues too. For the wheel arches I did use underseal as they get a hammering.

                          I would wire wheel that surface rust to get any loose stuff off, and then brush on rust converter before deciding on paint/ underseal. Just note that I am no expert either.
                          Last edited by markcro; 27-10-2021, 03:06 PM.
                          We all stood around in a circle naked, thrusting our clinched fists in the air screaming "Jap Power!!"

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                          • #14
                            Jonny Smith recommends some stuff in his latest video:
                            https://www.youtube.com/watch?v=y1TN9Dlyc7w
                            "All the finesse of a badger." (cdiv)

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                            • #15
                              Another recommendation for Raptor. Especially the tintable version. Check out my Evo thread where I documented the rebuild.

                              Very easy to wash clean. Build up a couple of layers to combat chipping.....

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