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Thread: Spraying Advice

  1. #1
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    Default Spraying Advice

    Just in the process of colour coding the chrome V using rattle cans, I'm primed and ready for colour so I have a few questions to ensure I get the best finish...

    Should I wet sand inbetween each coat of colour or just the final one before lacquer?

    Do I polish up after sanding before applying the lacquer or after?

    Finally do I wet sand the lacquer then polish up to finish?


    Advice appreciated

  2. #2
    Regular Member mattbrad30's Avatar
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    Hi mate what i done was sprayed the colour left it to dry done another coat then left i then got the laq done at least 4 to 5 coats leave to dry 24hrs then get 2000 wet an dry sand so its dull then cut it back i use 3m extra fine compound

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    Default

    Ok cheers for that!

    So you didnt sand before applying lacquer?

  5. #5
    Regular Member mattbrad30's Avatar
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    Default

    no mate if you sand you will see it once you laq it

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    VIP-Member GSiFan's Avatar
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    Vehicle : Vectra GSi 3.2 V6

    Trim : GSi

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    Default

    The base coat with metallic paint dries with a rough texture. If you sand that, you lose the metallic quality of the paint. The lacquer fills in the texture and adheres to it, creating the smooth, shiny surface with the metallic texture inside it.

    Does that make sense? You then sand the final lacquer coat to a fine finish using wet and dry and then compound, as described.

    Lacquer should be painted before the paint basecoat has cured but after it has JUST dried. That way, the lacquer will adhere to the base coat. Leave it too long and the lacquer may not stick and you could get adhesion failure and the lacquer peeling.

    Paul
    2003 Vauxhall Vectra GSi 3.2 V6

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    Default

    Thanks for the advice, the colour and lacquer is now on.

    In terms if sanding and compound, I only have 1200 wet and dry, is this too harsh for the lacquer? Compound wise I dont have a DA, I have some original t-cut and SRP will these do the job?

    Dont wanna sand it if i dont have sufficient compounds to bring back the shine!


    Thanks

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    VIP-Member GSiFan's Avatar
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    Vehicle : Vectra GSi 3.2 V6

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    Default

    1200-grit will not give you a fine enough finish. You can get 2000-grit or finer wet and dry paper on eBay for a few bob. I bought a pack of about 20 sheets of assorted grades (up to 2500-grit) - delivered - for something like a tenner. I bought Klingspor paper, a German brand. It holds up really well. As regards a compound, Halfords sell a rubbing compound for a few quid that seems to work well, in my experience. It comes in a yellow toothpaste-style tube. I hope this helps. Paul
    2003 Vauxhall Vectra GSi 3.2 V6

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    1200 is a bit rough although I have used it before with a drop of washing up liquid in the pot of water. 2000 is more suitable really though. Forget the t-cut, the SRP will polish it ok although it may take a fair bit of effort (just from my experience).

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    Default

    Thanks again, bought some 2000 and halfords rubbing compound, on the can of lacquer it says to wait 2 weeks before using a rubbing compound, do I really have to wait 2 weeks now to finish it off!? I just wanna get it on the car haha!

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