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What grit to use for enhancing gloss and very minimal orange peel?

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  • What grit to use for enhancing gloss and very minimal orange peel?

    I am in the process of planning to wetsand the recently painted hood on my car. The paint job was completed a week ago. The bodyshop that repainted the hood used a high-end European paint manufactured by Sikkens, which is known for its ultra-hard clear coat finishing. This line of auto paint exceeds all OEM specifications in terms of quality and environmental compliance.

    According to the bodyshop, they sprayed TWO layers of clear coats on my hood. The second layer of clear coat is thicker than the first coat for both durability and margin for correction in case of dust-nibs. According to the bodyshop manager, the clear coat they applied on vehicles are thicker than almost all OEM clear coats.

    Flash-baking was utilized in between coats. After the final layer of clear coat was applied, they baked the paint in the oven.

    After the car is rolled out of the oven, they did NOT wetsand or polish the car. They only washed the car with a bodyshop compliant car soap.

    When I picked up the car after the hood is repainted, I noticed that the surface of the hood is relatively smooth. Orange peel is very minimal, although it exists. Orange peel level is no match to the factory smoothness. One thing I notice is that the newly painted hood lacks gloss. It is shiny with the help of the clear coat, but it lacks the depth and gloss that the factory paint possessed.

    I tried giving the hood a few passes using M105 and an orange 5.5" orange LC pad. The M105 barely made any difference in increasing gloss. The bodyshop manager was not lying when he claims that the paint he uses is one of the industry's hardest. The hardness of my BMW's paint does not rival the hardness of my newly painted hood.

    I understand that most bodyshops wetsand newly painted surfaces to a certain extent and give it a polish to bring back gloss and to reduce orange peel. However, the highly experienced painter who painted my car was so good at minimizing orange peel during the painting process, that wetsanding was rendered unnecessary to remove orange peel. The problem now, however, is that the clear coat is not 100% smooth because wetsanding was skipped. There was not enough orange peel to justify wetsanding the surface. And because the newly painted clear coat is not wetsanded and polished, gloss and depth is not maximized. When I look at the the paint using a magnifying glass, I could see that the clear coat is not smooth at a microscopic level, which hinders gloss.

    Now, in an attempt to increase gloss and depth to my newly painted hood, I have decided that wetsanding is necessary. There is minimal orange peel, but highly tolerable. The only thing I find intolerable is the lack of gloss due to the unsanded, unpolished clear coat. I strongly believe 3000 grit and medium force would suffice in achieving my goal at maximizing gloss on the hood. However, I would like to seek opinion on that.


    Also, before I go ahead and wetsand away, do you advise that I give M105 another go, this time with a LC 5.5" Yellow pad? That is virtually the most aggressive setting I could possibly go. Would that sufficiently buff away the clear coat imperfection? Or would that simply be a waste of my M105?

    Or Perhaps I should just slap on two coats of NXT 2,0 and one M26 and call it a day when cure time is over???




    This is what the hood looks like currently:


    I am bothered that the gloss and depth of the newly painted hood BEFORE LSP is no match to the OEM paint.

  • #2
    Re: What grit to use for enhancing gloss and very minimal orange peel?

    I love wet sanding!
    In body shop, we did two sanding sessions. First: 1500 grit. Second: 2000 grit.
    Use a block on the big, flat areas and use a soft rubber pad on tight areas.

    On the first session we would level out all the orange peel. Then used 2000 to level out the 1500 scratches, basically making less buffer work.
    Daily - 09 Chevrolet Colorado - Techno gray metallic
    baby - 92 Chevrolet Caprice Classic - aged, yellowed, white.

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    • #3
      Re: What grit to use for enhancing gloss and very minimal orange peel?

      Hey dope92cc,

      Since you are a bodyshop personnel, do you notice that freshly painted clear coat tends to have some minor imperfection?

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      • #4
        Re: What grit to use for enhancing gloss and very minimal orange peel?

        Originally posted by the_invisible View Post
        Hey dope92cc,

        Since you are a bodyshop personnel, do you notice that freshly painted clear coat tends to have some minor imperfection?
        pretty common. What kind of imperfections? Runs/sags? Debris?
        Daily - 09 Chevrolet Colorado - Techno gray metallic
        baby - 92 Chevrolet Caprice Classic - aged, yellowed, white.

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        • #5
          Re: What grit to use for enhancing gloss and very minimal orange peel?

          I suggest doing test spots in small areas rather doing doing the whole hood with each test. Start with the least aggressive, and work your way up.

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          • #6
            Re: What grit to use for enhancing gloss and very minimal orange peel?

            Here is the macro shot using magnifying glass... invisible to the naked eye, but hindering gloss as a whole. Maybe they are microscopic orange peel? I think I have reduced it slightly by some 10% after a few passes of M105. Oh, it only shows up when I look at the paint at a 45 degree angle.

            This was non-existent on the OEM paint... every time I look at the newly painted hood, I get bothered by it. I am crazy.



            Here is what it looks like at a normal distance:



            Will test spot for sure... it is uncertain whether my setup could remove sanding marks on this ultra tough paint.

            Seeing that this imperfection is so microscopic in nature, I believe 3000 grit may work. Would anybody advise 3M 2500 grit wetordry? Or should I order some unigrit 3000 grit just to be sure? I should wait til the paint fully cures anyway.

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            • #7
              Re: What grit to use for enhancing gloss and very minimal orange peel?

              Just wetsanded and posted result in another thread...

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              • #8
                Re: What grit to use for enhancing gloss and very minimal orange peel?

                You were just bound and determined to do this, weren't you?!?!

                Did the painter at the body shop give you any sort of measurement of clear coat thickness on his respray? He says he puts down more clear than a factory paint job, but do you know for sure? Did he have any clue that you might be just jumping in sanding his fresh work?
                Michael Stoops
                Senior Global Product & Training Specialist | Meguiar's Inc.

                Remember, this hobby is supposed to be your therapy, not the reason you need therapy.

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                • #9
                  Re: What grit to use for enhancing gloss and very minimal orange peel?

                  Originally posted by Michael Stoops View Post
                  You were just bound and determined to do this, weren't you?!?!

                  Did the painter at the body shop give you any sort of measurement of clear coat thickness on his respray? He says he puts down more clear than a factory paint job, but do you know for sure? Did he have any clue that you might be just jumping in sanding his fresh work?

                  To be honest, I am not very satisfied with the paint job I recently got, and if I screw it up, I will pay the top people to redo it. I have nothing to lose.

                  When the manager told me that the Second Layer of clear coat is thicker than the OEM single layer clear coat, and that his Sikkens paint/clear coat is the hardest in the industry, I took his word for it. It is hard to measure just how thick the clear coats are because we all agree that the thickness of the clear coat always vary if sprayed by hand. Robotic painting booths in production lines are consistent. Human hands are not.

                  I told the bodyshop manager that I would be wetsanding the hood myself. All the people in the bodyshop were shocked and asked me why I wanted to do that. I simply told them that I am not satisfied with the orange peel and dullness of the paint job. The manager told me to becareful and advised me to do it 3 weeks later.

                  Shyneman informed me that it is best to wetsand the hood ASAP to let the solvent escape. I explained in great detail to Shyneman in Private Mesage about the condition of the hood, and we both agreed that the dullness on my hood is caused by solvent unable to escape through the clear coat, thereby causing haziness in the paint. Shyneman also told me that if I wetsand the hood, I would let the gas escape and enhance the gloss by preventing the solvent from bursting venting holes through the clear.

                  What I do not understand is this. Aside from having the hood repainted, I also had the Passenger-side fender repainted at the same time for $80 for rock chips and dent. The fender had no orange peel or gloss issue. In fact, the fender looks just fine. The hood, on the other hand, was lacking gloss and depthness. They were both painted together at the same time. I do not understand why the hood turned out so badly while the fender was not too bad!!!! The good and bad even out. Having my entire fender fixed for $80 is a good deal.

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                  • #10
                    Re: What grit to use for enhancing gloss and very minimal orange peel?

                    Id assume its the difference between not only painting, but visual effects of a horizontal vs vertical surface, just my $.02
                    www.idetailautopros.com
                    iDetail Professional Automotive Detailing

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