Is this normal when Wetsanding???

I

imported_Erik Mejia

New member
I have recently had my hood repainted......



In order to match the finish to the rest of the car, the clearcoat had to be wet sanded.....



the guy used sand paper, then he used a wool cutting pad with 3M rubbing compound, then he used a foam cutting pad with Imperial Machine glaze......



The hood looks terrifically coool, no swirl marks, extreme shine and all........buut, if you look at it closely, or under certain light circunstances (such as under a tree, in the shadow) you can see some sanding marks........



Is this normal? Or should the finish be smooth even when looked from really close?

Maybe he should have used finer grit sand paper........I dont know.....:confused:



Thanks for your infinite knowledge!
 
I think it would need to be re-buffed. To remove those marks. The glaze will only mask the marks. Try starting out with the less abrasive polish first, like SMR, next would be FI-II



I'd be it wasnt buffed out completely





hope it helps



alex
 
caddyman said:
I think it would need to be re-buffed. To remove those marks. The glaze will only mask the marks. Try starting out with the less abrasive polish first, like SMR, next would be FI-II



I'd be it wasnt buffed out completely





hope it helps



alex
Click to expand...



I'd like to second that. Also, do you know what grit paper the guy used to sand with?
 
Sometimes body shops get in a hurry and try to cut corners. If I did it, I would have wet sanded with 2000 grit paper, compounded with 3M fine cut compound (removes 1000 grit scratches), reglazed with 3M Perfect-It II or III (removes 1500 grit scratces), then hit it with 3M Hand Glaze.



I'm guessing the guy used 1,000 grit paper and did not spend enough time compounding and did not reglaze with a fine polish.



I would not hit it with more compound. Best now to finish the work by hand using 3M Perfect-It II and follow again with 3M Hand Glaze. If you have it, I would use good terry cloth toweling wrapped around a sanding block to do the Perfect-It polishing.



db
 
I agree, those marks you're seeing are the result of a not-so-great job. I had a panel wet sanded recently b/c of poor work done by the prior owner, and it came glossy and new looking and i've inspected it from all angles in ALL lights, and i see no signs of the work.



:nixweiss I'd take it back and point out what you've found.
 
What I have noticed on two of my cars in the past that have had panels re sprayed, is that when they are preping the old surface they have sanded it at somne point. after the high build primer and paint has been put on the paint finish is good, however if you look close you can still see what looks like sanding marks, however they are under the paint. I have this on my Porsche 996 were the hood was repainted (common due to stone chips), although I am prob the only personthat can see it due to my wish for perfection. - just a different view on the prob - maybe it is under the paint ?
 
Do what david said.



I am fixing stone chips on my hood right now by filling them in with touch. paint and then sanding down with 1500 grit paper. All around the touch up paint there are sanding marks. A couple days ago I ubffed out of marks by doing almost exactly what david said. Now you can't see where the touchup paint is.......
 
I see this on repairs to some of my customer's cars. Recently I washed one of my regular's rides- a 2001 BMW Z3 (black) which was fresh out of the shop from an accident. I saw sanding scratches in the hood at certain angles, as well as overspray in places they obviously didn't cover (this really irks me ). "Good enough" is a subjective thing, isn't it?



All this illustrates one thing; If you REALLY want your car done right, you're gonna have to learn how to get it that way yourself. It shouldn't be that way, but unfortunately , it is.



Too many feckless people out there, in every line of work.
 
I´ve been at the shop while they did the job........



They did not rush at all........it took 4 hours just to sand the hood!



The problem is that some of the products you have in the US are not brought here by 3M..........



I really dont know exactly which sandpaper they used.....



Anyway, I spoke with him today, he told me to take the car there, he will take a look at it.........Just FYI, the car has been at a show last week, and everyone was raving on the paint job.....but, anal as I am.....:D



I´ll let you know how this turns out.......
 
Guitarman said:
I see this on repairs to some of my customer's cars. Recently I washed one of my regular's rides- a 2001 BMW Z3 (black) which was fresh out of the shop from an accident. I saw sanding scratches in the hood at certain angles, as well as overspray in places they obviously didn't cover (this really irks me ). "Good enough" is a subjective thing, isn't it?



All this illustrates one thing; If you REALLY want your car done right, you're gonna have to learn how to get it that way yourself. It shouldn't be that way, but unfortunately , it is.



Too many feckless people out there, in every line of work.
Click to expand...
I could'nt agree with you more Guitarman!!!

I too have a bodyshop horror story. I will not bore every body with the details, only to say it took me 6 months to get the problems taken care. Even then everything had not been fixed. Finaly just to keep my sanity I ended it with the body shop and finished fixing the inperfections myself. I will never go through that again!!! Sine then I have bought alot of body tools and outfitted my shop to spray paint. Much to my amazement I have easily exceeded the quality of work thats obtainable around here. I will NEVER be held hostage by another body shop again! Thanks for having the guts to make your post. I finally know I'm not crazy!





:bounce
 
Well........My case at least wasnt as extreme. it is barely noticeable, the color blend is perfect, as well as the texture between panels......you cannot even tell it is not factory paint......

;)
 
Mugenman it was not the paint job so much. There were just a few places that were not sanded as smooth as they should have been before buffing. The color match's perfectly, they did get some overspray on some places that were just plain uncalled for. My biggest complaint has to be all the damage they done to the intereior parts disassembling the car. In short they tried to say it was already like that, that young kids do alot of damage. Well there was 1 big hole in there theory. I DO NOT have kids and since I'm over 40 and my wife is 38 I know they were not talking about me. Its a good thing the day before the car was dropped off at the bodyshop it was at the dealer being serviced. Picture this. My insurance rep the body shop people and my dealer service manager all in the body shop going over everything. The bodyshop finaly conceded when after they blaimed me for everything that was wrong to have my service manager tell them that I'm one of the most anal customers they have, that my car DID NOT have 1 blemish on it when it came to them. Well they finally gave up and agreed to fix everything. Then I went through months of taking off work to take them the car to have something fixed only to take off work again to pick up the car and find that I have 3 NEW problems to be fixed to replace the 1 they were fixing! Do you see how crazy all this is? They drove me into the ground with that tactic. Never again!!!!!!!!:mad: :mad: :mad:
 
YESSSSSSSSS!!!!!!



I understand you!!!



Been there, done that!!!



I took my previous car to a relatively good shop, they had some BMWs, and imports, and they did a TERRIBLE mess!!!!!!!



They broke interior panels, left the speaerks loose, broke the grills, the sail panels behinfd the mirros, left the side mouldings loose, loose emblems, overspray everywhere, even on the windscreen, paint peel did not match.........



I was in hell!



This time, I took my car to the best shop around, there was some much effort in getting it done right.......you could see it, they covered the whole car with a film to avoid excessive sanding dirt in it, covered the wheel, and interior carpets........It´s a 10 point job, buuuuut it was expensive......this guy does porsches, Ferraris and such cars.......I think it was really well spent money......



:)
 
Mugenman you know the thing that gets me the most? After I got my insurance rep involved and pointed out BLATANT FRAUD by the bodyshop.[they charged for parts and labor for work they did not do] My insurance co. did nothing to them and even went ahead and paid them for it! This shop has been known as the best around here, many happy customers. I had seen there work and even had them do work for me before, beautifull work I might add. I thought I had done all my home work. However after I go to pick my car up[it was dark and late so I could'nt tell much at the time] I get it home in the shop and I can not believe what I'm looking at. The first thing that came to mind was that these people must think I'm a blind stupid fool!! I found out a few days later that the previous owner had sold the shop 2 weeks before I dropped the car off, and to top things off all of the great craftsmen that worked there for many years had quit and left because of there NEW buisness practices. Nothing would please me more than to see the earth open up and swallow this place and all who are inside!:mad: :mad: :mad: I'm going to shut up now because I said I was'nt going to do this. I'm sorry and I appologise to everyone. I'll leave you with this one thought. When dealing with a body shop, DO YOUR HOME WORK! When your satisfied you've done your home work and your ready to go to the shop, DO MORE HOME WORK or you will be sorry!:o :o :o
 
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