Thoughts and opinions please

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PostPosted: Thu Oct 21, 2021 12:21 pm
Hi All

New to the forum and looking for some opinions on a bike I painted 6 months ago. Everything was fine with bike until yesterday when the customer woke up to find his bike in the condition shown in the pictures. Personally it looks to me like it's either been wiped with lacquer thinner or been exposed to extreme heat. But wanted further opinions to confirm my thoughts.

Thanks in advance

Leo
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PostPosted: Thu Oct 21, 2021 1:51 pm
Rattle can paint job???
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PostPosted: Thu Oct 21, 2021 3:33 pm
Hey

No spray gun using basecoat and 2k clear

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PostPosted: Thu Oct 21, 2021 3:53 pm
Lacquer thinner wouldn't do that to cured clear coat.
Never seen anything like it myself.
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PostPosted: Thu Oct 21, 2021 3:59 pm
it by any chance wouldn't be a plastic or fiberglass tank would it?
Jay D.
after looking at it more it looks like it might be a metal tank, looks like a seam at the bottom. i would cut one of the veins open and see what it smells like. my guess is its gas seeping from that seam.
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PostPosted: Thu Oct 21, 2021 4:07 pm
So 6 months ago with nothing going on????.... and now this....well, it had to be exposed to "something" to cause gas to build up in those stretched out wrinkles. He is not inferring this is something that you are responsible for, right???
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PostPosted: Thu Oct 21, 2021 4:31 pm
Hey guys thabks for the reply. No it is indeed a metal tank. I haven't seen the blisters in person yet just the pictures that he sent me. I've not seen or touched the tabk for 6 months but he is inferring indirectly that the paint must be the issue. When he first described the damage prior to seeing images it sound like micro blistering but having seen the extent of the damage its clearly not that.
A further picture.


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PostPosted: Thu Oct 21, 2021 5:21 pm
Primer/base coats too thick and/or insufficient flash off times.
Chris

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PostPosted: Thu Oct 21, 2021 6:38 pm
NFT5 wrote:Primer/base coats too thick and/or insufficient flash off times.

Chris,
Wouldn't that have happened fairly quickly? 6 months seems like a long time for trapped solvent to make it's way to the surface. I'm just asking, not arguing as you definitely have way more experience than I do.
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PostPosted: Thu Oct 21, 2021 8:45 pm
It's hard to be definitive without seeing it and sanding back through the layers, but I have seen it before. What I should have added to my earlier reply was "incompatible solvents or products".

What I believe happened here is that the solvent in the base softened the substrate primer or previous paint layer, similar to what happens when you get wrinkling like that from the solvent softening the edge of a repair. I suspect the "hot" solvents flashed off but left the underlying layer soft but not enough solvent to cause a more violent eruption like solvent pop. It's a bit like when you prime over a repair and it looks perfect but then wrinkles up after base, or even clear.

Heat may have been an issue too, causing the substrate to wrinkle as it dried out.

Lots of variables here. We don't know what products were used or the procedures in their application.

Petrol leaking from that seam? Yes, another possibility if non-hardened products were used underneath. Effect would be the same as I described above.
Last edited by NFT5 on Thu Oct 21, 2021 9:06 pm, edited 1 time in total.
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