E36 1998 323i COUPE - DIY mirror painting - what went wrong... :(

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  1. E36 1998 323i COUPE - DIY mirror painting - what went wrong... :( 
    #1
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    Markie76's Car Details
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    Hi Guys,

    I finally decided to paint the aftermarket mirror housings that were fitted to my car when I bought it. My car is Steel Blue metallic.

    Heres what I did;

    1. Sanded down the plastic with 1000 grit until there was no 'shine' on the plastic & washed it thoroughly.
    2. Leave to dry for 24 hours.
    3. 3-4 coats of universal primer at 15 minute intervals.
    4. Leave to dry for 24 hours then inspect - the finish looked perfect, even all over.
    5. Hycote top coat (acryllic) 2 coats at 20 minute intervals.
    6. Leave to dry for 24 hours then inspect - I was impressed with the finish for a spraycan job IMO.
    7. Lacquer time - holts acryllic clear lacquer - this is where it started to go wrong

    Holding the can at a distance of about 20cm I started spraying with sweeping motions from left to right and back again.
    After 2 sweeps I could see the top coat 'glistening' unexpectedly under the lacquer - a few seconds later it seemed like the blue pigment was separating under the lacquer but not mixing with the lacquer.

    I left it for 24 hours and the lacquer coat looks like expected but the paint underneath seems to have 'mottled' and no longer looks pristine like it did at step 6.

    Pictures below (click for full size) - if anyone can have a look and advise what may have happened and;

    1. How to rectify? (full rub down and start again?)
    2. How to avoid happening again? I have the large main mirror body (which is currently looking lovely in steel blue) to lacquer, then the other mirror.

    Thanks.









     
     

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    #2
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    bmw 328 sport's Car Details
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    did you use two different makes of paint
    looks like its reacted to me
     
     

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    #3
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    Quote Originally Posted by bmw 328 sport View Post
    did you use two different makes of paint
    looks like its reacted to me
    Thanks for the reply.

    The colour paint was Hycote brand and the lacquer was Holts - both acrylic and I've always used Holts lacquer across all my cars. I've never really 'matched' paint & lacquer - because you always have a can of one or the other in the garage and I've never needed to buy 2 cans at the motor factor

    But both are acryllic and the lacquer hasn't gone cloudy - ie the colour coat hasn't mixed with the lacquer at all, its all clear and shiny.

    So is it possible that the Hycote paint is sensitive and the solvent in the Holts lacquer has upset it

    Looks like I got some sanding to do over the weekend
     
     

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    Quote Originally Posted by Markie76 View Post
    Thanks for the reply.

    The colour paint was Hycote brand and the lacquer was Holts - both acrylic and I've always used Holts lacquer across all my cars. I've never really 'matched' paint & lacquer - because you always have a can of one or the other in the garage and I've never needed to buy 2 cans at the motor factor

    But both are acryllic and the lacquer hasn't gone cloudy - ie the colour coat hasn't mixed with the lacquer at all, its all clear and shiny.

    So is it possible that the Hycote paint is sensitive and the solvent in the Holts lacquer has upset it

    Looks like I got some sanding to do over the weekend
    yes mate not all paint will go together hence whats happened
     
     

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    #5
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    I wouls agree with the above its a reaction with 2 types of paint
    ]
     
     

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    #6
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    Quote Originally Posted by bmw 328 sport View Post
    yes mate not all paint will go together hence whats happened
    Quote Originally Posted by mrkebab View Post
    I wouls agree with the above its a reaction with 2 types of paint
    Grrr...!!!

    Ok, whats the best (easiest ) way to remove the lacquer?
     
     

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