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  1. #1
    Join Date
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    Default Paint day coming soon

    The clear is mostly gone from the roof and trunk plus fixed a dent in the quarter panel. Have everything to do it, just an immense job to be doing on a driveway.

    Has to be sanded, primed, painted and cleared pretty much all at once. Have to avoid bugs, dirt (15 feet from the road), wind, sun, cold and hot.

    Since I'm at it I should sand, touch up dings and scratches and respray clear on everything else to all look good. Almost forgot both bumpers. Not looking forward to this at all.

    Painted many cars and I'm even good at it, just never under these circumstances. I will take some pictures.
    95 E34 530I V2.37
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    Those who make peaceful revolution impossible will make violent revolution inevitable.

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  2. #2
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    Update zero. Between the weather and circumstances I have been reading so much new conflicting information on what I should do I decided to ignore all that hysteria and just wing it. I mean I have painted probably 35 vehicles but never in a dirty drive with not much room to spray lol.

    Kid got pneumonia and infected me with the crud so a willingness to proceed has held me back. I think I will start with taping the roof, or trunk, not sure. Would like to do it all at once but not sure if that's possible. Anyways I'll make a guess tomorrow what area I want to start taping and inspect what I am up against first. In my feverish brain fog just not sure how to proceed.

    Stop thinking and just do it already! Yep that's where I am at. Might rain or not. I'll tape, worst scenario is I pull the tape and paper off. Blah...
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #3
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    Default

    Yep raining. Since I haven't restored anything in like 3 years I was reading about sandpaper grades and get so much conflicting info I decided to do a recap of WTF are these guys talking about. Sanding before base coat and clear and waiting times etc...

    Found out P-800 is about 500 grit US. I am in the US and never knew about the P-ratings til today. A P600 is about a 400 grit. A P1200 for prior to sanding a clear is about a 600 grit paper. Visited a bunch of sites that do not say where they are from or specify grits. They also do not specify US vs EU specs. Huge difference if you don't know this common knowledge?

    I was thinking how the F can you use a 1200 grit to level out any orange peal? Well P1200 is about 600 grit.

    The P factor is EU grades. It's kinda like US vs metrics which there is no formula to make sense. They are close until you hit 180 then it gets jacked.

    240 is like P280
    320 is btw P360 and P420
    400 is like P800
    600 is like p1200
    800 is like p1500
    1500 like p2500

    So for any old school people this is the ratings when we go to shop for sandpaper. I all ways do research even if I know what I know but just more info or details of what I am into.

    Anyways, hope this helps someone. You can search a chart but I think I am pretty spot on.

    Yep on, I do not know anything about the finer papers at all. I have used 2000 papers before and the was cause I didn't want to polish anything. I waxed it and was like glass. Yeah probably not right but was dead nuts.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  4. #4
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    Default

    Yeah let's see some before pictures, u kin du it while it rains. I haven't painted much, but guessing proceeding as carefully as possible, and then maybe touch up spots on bugs and dirt may do the trick acceptably well?? What color are you going with, your car is black, right?
    Last edited by Rustam; 10-10-2021 at 03:15 PM.

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  5. #5
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    Default

    Quote Originally Posted by Rustam View Post
    Yeah let's see some before pictures, u kin du it while it rains. I haven't painted much, but guessing proceeding as carefully as possible, and then maybe touch up spots on bugs and dirt may do the trick acceptably well?? What color are you going with, your car is black, right?
    Yep just going same color for this job. Dent picture is gone, I have like 10 but can't find any. Been converting my knowledge from what I knew to what I learned back to what I know on sandpaper grits. That slowed things down lol. I have Fri-Monday to attempt something. The entire car needs to be touched up and cleared but might just work on the roof and trunk, oh yeah and the quarter panel and bumper. While at it I can spray the whole thing in clear is my point. 1 hour vs 2 hour, I have plenty of clear, paint and primer. Just the prep time may turn into an issue depending on weather.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  6. #6
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    Default

    Table comparing sandpaper grit standard in Europe and USA
    The below table is originally from Wkipedia, but with some slight changes. What it shows is two colored sections, a section where the difference is small enough to not matter too much (green) and a section from where difference is huge and must be thought of (red). As can be seen, it is only when using finer grits that the difference need to be considered. But in the fine grits, the difference is huge.
    http://www.mibnet.se/home-improvemen...standards.html

  7. #7
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    That difference really confused me. I figured the P designation was a brand or quality thing until I looked into it. I printed out a chart and just wrote what was recommended at the different grits.

    Quote Originally Posted by shogun View Post
    What it shows is two colored sections, a section where the difference is small enough to not matter too much (green) and a section from where difference is huge and must be thought of (red). As can be seen, it is only when using finer grits that the difference need to be considered. But in the fine grits, the difference is huge.
    http://www.mibnet.se/home-improvemen...standards.html
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  8. #8
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    Default

    Not going to comment on each pic, just summarize it here.

    My old DA sander is at least 35 years old and needed another coat of duct tape to refresh it so I just got a new one.

    Block sanded the dent, very good first try, primer will finish any spots and stuff, very straight. Can't tell in the pic. The rest are of the trunk lid.

    I thought (hoped but know better) I could just sand the clear off but after trying that I realized I needed to cut the paint off. The sun really ate into it and not worth the chance after all the work to get to that point. Started with 220 US grit but that was short lived and I jumped to 120. About 8 sticky papers to just do the lid part. Took about 1.5 hours just for the top. You should be able to see the shiny looking black spots with flaws. It is actually very smooth but not something I want to paint over.

    I'm low on 80 grit but think that's what I will use on the roof, then cut with 120 to help smooth the sand paper grooves.

    Notice that there are 2 primer coats under the clear and paint. There were 4 low areas, or dents and they sanded out almost completely. I used some SEM spray filler primer on those areas which I will 220 before real spray gun primer so it will be real smooth. The areas that cut through were actually high spots, looks like an amateur with a new DA sander did it but it feels like glass by hand now. We will see in the end.

    This is basics that need to be done before priming for paint. It's not hard but if you never did it before it could turn into something real ugly fast lol. Watch a bunch of videos before you try it.
    Attached Images Attached Images           
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  9. #9
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    Default

    Now that I look at the pics, I do understand the low spots but WTF are all the high spots? Could never see them due to the paint finish or didn't notice that before. Definitely not pushing on the Da, real strange but whatever. Time to ignore and move on.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

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