1997 E36 318is coupe - spray paint problems

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  1. 1997 E36 318is coupe - spray paint problems 
    #1
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    Hi all
    The other week I did a quick spray job on my spare alloy which, even though it was a quick job, went on quite well. Anyway, I decided to do my kidney grills and this is where the problem started. The undercoat went on well but when I sprayed the black gloss it went all bubbly. Not big bubbles but more like an Aero. I put a few coats on to see if would sort itself out but it didn't. I used a different paint to the one that I sprayed my alloy with but price wise was fairly similar. I only used that one because there wasn't any left at the first shop. The only thing I can think of is that it was a pretty hot day the day I sprayed the kidney grills. Could this have been the cause of the Aero like bubbles?

    Secondly, what's the best way to strip them back down to start again?

    I've attached a couple of photos to show you the results.

    Cheers, Mat.
    Attached Images
     
     

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    Its reacted with something mate. Looks like paint types weren't compatable or wrong primer used. and that paint looks like you've put too much on - and maybe too much too quick and its bubbled.
     
     

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    Thanks for the response. I thought it might of had something to do with the heat. So what paint should I be looking for? I used Halfrords paint when I sprayed the alloy.

    You're right about putting too much on as well. I got pissed off with the bubbles and tried putting extra on to smooth them out then sand it down prior to lacquer. As you can see, this failed miserably!
     
     

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    adam.wilkinson's Car Details
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    How long did you spend prepping them mate. Looking at those pics it looks like silicon reaction, or something like that! Wax or something...

    Spend plenty of time sanding and get them in washing up liquid, dry them, sand, wash.

    Just to make sure nothing is on there to stop pait laying down.
    If it aint broke, don't fix it!!!
     
     

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    the heat is a possible cause but more likely as suggested a reaction with something on the surface of the grill.

    a good rub down and start again, try using the same supplier for all the paint stages as well.

    Good luck and show us all when done....
    GOODBAD

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    Auto. Black Leather. 18" AC Wheels. Bilstien Suspension. Twin 10" JBL Subs. JBL components front and rear. Kenwood motorized in dash monitor, Twin headrest monitors. German Style plates. Black kidney Grills. Smoked Indicators. BMW Hardtop.
     
     

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    Cheers, it'll be in a week or 2 so i'll post the results.
     
     

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    How long did you wait between the primer and the gloss....if its not within a certain time then it has to completely dry or it'll bubble like it did.....
     
     

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    I've just been looking through the kit I used for prep etc and it turns out I've used a cloth to wipe down that came out of the bag of kit that I use for my shotgun. It looks like it fell out of the bag and I think it was the cloth I used to polish up the stock when I stripped it down and revarnished it. This would have had wax on it though it was a finishing cloth so it wouldn't have been visible on the cloth if you know what I mean. Anyway, lesson learnt. It'll be new kit next time.
     
     

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    Your not called Raul are you?!?!
    If it aint broke, don't fix it!!!
     
     

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    Quote Originally Posted by StK View Post
    How long did you wait between the primer and the gloss....if its not within a certain time then it has to completely dry or it'll bubble like it did.....
    Exactly what stk has said. With the warm weather the paint could have dried faster and its inbetween dry and being wet and if more paint is applied it'll crack. Same goes with lacquer
     
     

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