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06-13-2012, 11:12 PM | #1 | |
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Severe painting issues, it never ends. Need help
So I spent the last several days after work painting my F40 body, masking, painting hedliight buckets etc. I used Zero paint. It went on a little thick but no issues. Went to sand it smooth today and it went through. It didnt even get the texture smooth before it burned through. I am ruining body after body and it's killing me.
I have never succesfully painted/sanded/polished a body without burning through. I honestly want to just light everying on fire. anyway, I realized a few things. 1. started with micromesh 4000, then dropped down to 3200 to get it smooth. Because its so light, the sandpaper burned through the paint from friction before it had a chance to actually sand the paint smooth 2. I used Tamiya 1000 sandpaper on some other areas. Paint got smooth FAST, but ended up burning through as well. 3. I have a Paasche airbrush, dual action. I used the samllest needle they make, #0 or #1 I forget. Paint seemed to go on nicely, but is this a bad idea? Did it not lay down enough paint per layer? I noticed even on some of the bigger flat parts it went through, obviously there was not nearly enough paint. I did 2-3 coats I cant remember, but the first 2 were mist coats. I basically just painted untill there was solid color everywhere. I guess I should have done another two coats? This is my weak part, I just cant seem to get it right. Any help would be appreciated. |
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06-13-2012, 11:17 PM | #2 | |
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Re: Severe painting issues, it never ends. Need help
I don't know, when I spray Zero paints it goes on so smooth I don't even have to sand it - just clearcoat and done.
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06-13-2012, 11:37 PM | #3 | ||
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Re: Severe painting issues, it never ends. Need help
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1. what PSI do you spray your Zero at? 2. I know I can thin their clear, can I thin the paint a bit? |
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06-13-2012, 11:46 PM | #4 | |
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Re: Severe painting issues, it never ends. Need help
zero paint is automotive paint. it dont need to be sanded and it makes very thin coats, so thats why you burn trough. dont bother with flatening base paint just shot it with good amount of clear and polish that
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Hemi Killer (06-14-2012)
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06-14-2012, 12:11 AM | #5 | ||
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Re: Severe painting issues, it never ends. Need help
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Thank you so far, I appreciate it |
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06-14-2012, 01:07 AM | #6 | |
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Re: Severe painting issues, it never ends. Need help
Just thin it a bit more, don't wory about a bit of texture, you will never sand it smooth withouth burning through, thin it and don't go to light, shoot the paint the same way you do clear and after clear you can send away.
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06-14-2012, 01:46 AM | #7 | |
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Re: Severe painting issues, it never ends. Need help
I agree with what has been said so far, but I had better luck with Zero paints by switching to a larger needle and nozzle. On my Iwata eclipse, it seemed to help when I switched from 0.35mm to 0.5mm needle and nozzle. (I even think Zero recommends at least a 0.5mm needle for the clear coats.)
With the smaller nozzle I was having to spray at a higher pressure (30psi+) to get a fine mist (instead of rough stippling) and even using mist coats, the finish was so rough you could rub your finger across it and the top layer would brush off almost like chalk dust. Now with the larger nozzle I spray at 20psi with no problems. I also had the most trouble with their white primer and pure white. They needed to be thinned down probably 20-25%. I haven't had any trouble though with actual colors. |
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06-14-2012, 01:51 AM | #8 | |
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Re: Severe painting issues, it never ends. Need help
I have not used Zero Paints yet, but I have a questions about your sandpaper. Reading your post I got the impression you were using a lower number paper to get things smooth - e.g. "started with micromesh 4000, then dropped down to 3200 to get it smooth". Sandpapers gets finer, and therefore better for "smoothing", as the number goes up. In other words, 3200 grit is more coarse than 4000 grit. Maybe I have misinterpreted your post though.
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06-14-2012, 01:58 AM | #9 | ||
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Re: Severe painting issues, it never ends. Need help
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06-14-2012, 07:59 AM | #10 | |
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Re: Severe painting issues, it never ends. Need help
At first i thought you were using the sand paper in the wrong procedure, but you explained why you dropped down. Also make sure you wet sand and not dry sand. With the paint you have to experiment a few times to get the painting process down with different psi and thinning. Get some plastic sheets or plexiglass as its cheaper than a body and practice a few different setups. Good luck.
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06-14-2012, 08:00 AM | #11 | ||
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Re: Severe painting issues, it never ends. Need help
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That said, I think the previous comments may be pointing to the fact that the paint may be drying before contact, giving you a rough surface. Some years back I had a similar problem with MCW paints that required some experimetation to get it to lay down smooth. If you have some practice bodies, use them to work on your technique and remember to be gentle with the polishing cloths. |
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06-14-2012, 10:09 AM | #12 | |
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Re: Severe painting issues, it never ends. Need help
To me, it seems like you're using far too rough Micromesh.
I use 6000 to START with, then go down to 12000 for a mega-shine. If I were you, I'd bin the 3200 and 4000 and get some real fine stuff, especially with airbrushed paint. It might seem like it's going on thick, but it really isn't. Your layer of paint is probably 1/2 the thickness of a sheet of thin paper so it will burn through really easily. Seriously, use MUCH finer Micromesh. You'll be gobsmacked at the shine 12000 will give you. ALSO..... Remember that Zero paints are MATT FINISH. They HAVE to be clear gloss coated to get a shine. You can Micromesh Zero paint until your fingers drop off and it WON'T ever shine without a gloss clear coat. Finally, if you're giving 2 x mist coats, give it another 3-4 top coats, then one last 'wet' coat. 2 x mist and a final top isn't enough. I've sometimes given car bodies as much as 8 - 10 coats. Roy. |
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06-14-2012, 10:54 AM | #13 | ||
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Re: Severe painting issues, it never ends. Need help
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Roy thank you for your time but im aware of this. The reason i dropped down so low is because the 4000 wasnt agressive enough to get it smooth. Ihave the other higher grits but they were useless. Your comment about the coats though helps alot. I was wondering i was apply enough coats. I have since sandesd all the yellow smooth down to tge primer. I will mask off and respray tonight after i mess around a bit Things i will change. 1. Move up from the smallest needle to the next size 2. Instead of two mist coats and one wet coat i will do three mist coats and 2the wet coats 3. Thinkthe paint a bit And see if i can cool down the room more Are mist coats easier to sand down than wet coats after theyve cured? Thank you everyone. I thinnk if i actually saw someone do it i would understand it immediately. |
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06-14-2012, 11:02 AM | #14 | |
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Re: Severe painting issues, it never ends. Need help
Are you sanding the basecoat colour without any clear..?? That's why you're burning through. They are not designed to be sanded back, in fact they work better without sanding. Unless you have some major defect in the paint or some serious roughness you shouldn't sand it. A little texture is normal with basecoat paints, so don't worry about that. The clear will level everything out and provide the smoothness and gloss you desire. From the sound of it I think you need to add more thinner to the paint as well. They say pre-thinned but they are still very thick. I always add more thinner for better results. Try some different pressures. Start at 20 psi and increase bit by bit until you find the best working pressure for your airbrush.
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06-14-2012, 11:25 AM | #15 | |
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Re: Severe painting issues, it never ends. Need help
Best I can do is a before and after clear example for you, hope it helps...
Before After Look how the colours change and darken especially the black which looks almost grey before the clear is added. Don't be too hung up on achieving a flawless finish with the basecoat because it's just that, a basecoat...
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