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Thread: 'Plastic grain' paint effect

  1. #1
    n00b 4 life mp3oplecarrier's Avatar
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    'Plastic grain' paint effect

    I am making a centre concole to mount my Epia board and am trying to make it match the coolbox and dashboards wrinkly grey finish. The box is made from MDF and I finally finished shaping it today but have been unable to find any 'wrinkle finish' paint.

    I thought I would try to improvise so I started by brush painting with a wood primer, and when it was tacky, I used the side of the brush to tap on the case and leave a slightly rippled effect. I did two coats of this and when dry I sprayed it with matt black aerosol to give a better undercoat to the grey bumper paint I was going to use for the final coat.

    I left this to dry for a few hours and I went out to my shed to apply the first grey coat and I found that the black and the white had reacted with each other and cracked apart to give a perfect match to the rest of the plastic in the car!

    I don't know whether this is any use to anyone, or even if I could repeat this on purpose, but it's worked for me this time!

    Steve
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    ....Yes, I know it has a stupid name, those crazy Japanese!

  2. #2
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    Interesting! Would you mind sharing the brand name of what you used and the temp of the shed at the time - I think that is the big factor, the right temp and time to cure.

    Did it react any further to the final coat?

  3. #3
    n00b 4 life mp3oplecarrier's Avatar
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    Brand names as shown on the tins, basically shop own brand white wood primer and typical generic matt black acrylic spray paint. It was quite cold in the shed (about 15 deg c) and the primer was touch dry when I sprayed the black. It probably took about an hour and a half for the effect to show. I used a plastic bumper paint as top coat and it did'nt exactly react, it just 'peeled back' from the white parts, but by building up the layers each coat covered a bit more.. finished pics here:

    Estima CarPC v2.0 build up pics

    The close up without the flash probably shows the effect best, I'll take some pics under daylight later in the build that should show it better.

    Steve
    ....Yes, I know it has a stupid name, those crazy Japanese!

  4. #4
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    Wow, the close up looks amazingly real. Thanks for the info.

  5. #5
    Maximum Bitrate TimmyM's Avatar
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    Since you used MDF you might be able to replicate the effect with joint compound or spackel. Spread a thin coat over the MDF then use a tool as you did with the end of the brush to get the effect you want then let it dry. After it drys you can sand it down slightly to knock off the rough spots. Prime it, then paint. Might also work with bondo.

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