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-   -   Paint Damage (http://www.clubcobra.com/forums/backdraft-racing/144883-paint-damage.html)

bobcowan 05-28-2021 11:36 AM
Paint Damage
 
So, I spilled a little fuel, and I got this. A proper repair will require the back half to be painted. It will take 3-4 weeks.

https://i.imgur.com/dC1yxSQ.jpg

There's some paint peeling and damage on the front end, too. I'll probably just have the whole car re-painted.

34fords 05-28-2021 11:42 AM
If you were running pump gas that should not have happened.

patrickt 05-28-2021 11:53 AM
Quote:
Originally Posted by 34fords (Post 1493378)
If you were running pump gas that should not have happened.
I'll say. I think I've spilled gas on every car I own and never seen that. What sort of gas is he using?:confused:

Kobura 05-28-2021 11:55 AM
There is definitely a lesson to be learned here. Details pls.

Mongoose930 05-28-2021 11:55 AM
That is awful !! What the heck kind of fuel are you using? I have spilled racing gas on my paint, wiped it off within a few minutes, and had no issues.

twobjshelbys 05-28-2021 01:08 PM
Wow, that's a bummer! It looks like the gas found its way under the cap and under the paint to the lowest spot where it simply made a bubble. It looks similar to what happens when water gets behind paint on drywall. You'll have to go all the way down to the bottom and it'll be difficult to blend the surface let alone the color.

What color would you repaint?

Good luck.

spdbrake 05-28-2021 03:12 PM
Quote:
Originally Posted by twobjshelbys (Post 1493388)
Wow, that's a bummer! It looks like the gas found its way under the cap and under the paint to the lowest spot where it simply made a bubble. It looks similar to what happens when water gets behind paint on drywall. You'll have to go all the way down to the bottom and it'll be difficult to blend the surface let alone the color.

What color would you repaint?

Good luck.
Tony has a point. If the fumes or gas liquid gets under the paint it will lift. Was this right after a fill-up? And was the car sitting in the sun? Gasoline volume increases 1% per 10C and what comes out of underground tanks is much colder than ambient.

patrickt 05-28-2021 03:18 PM
Quote:
Originally Posted by spdbrake (Post 1493394)
Tony has a point. If the fumes or gas liquid gets under the paint it will lift. Was this right after a fill-up? And was the car sitting in the sun? Gasoline volume increases 1% per 10C and what comes out of underground tanks is much colder than ambient.
Wait a minute. Wouldn't water freezing and thawing on your car do the same thing?%/

twobjshelbys 05-28-2021 03:26 PM
Quote:
Originally Posted by patrickt (Post 1493395)
Wait a minute. Wouldn't water freezing and thawing on your car do the same thing?%/
Yes, but I wouldn't expect water to have a solvent effect that would unbond the paint, at least this quickly. (Remember from high school chemistry that water is the universal solvent. Sometimes it just takes a long time...)

twobjshelbys 05-28-2021 03:52 PM
Quote:
Originally Posted by spdbrake (Post 1493394)
Tony has a point. If the fumes or gas liquid gets under the paint it will lift. Was this right after a fill-up? And was the car sitting in the sun? Gasoline volume increases 1% per 10C and what comes out of underground tanks is much colder than ambient.
I suspect this is close to what happened... Rather than a spill, the tank was filled, topped off, and then the car parked. The gas expanded, slowly, and got past the seal on the cap and over time seeped slowly enough volume to break the bond of paint to surface. The lowest point is a "bubble" so it took a while.

How it happened is a potential mystery or a lesson (don't overfill), but that it happened is a major bummer.

Modern vehicles have the evap recovery tank that captures vapors, but that can get flooded with liquid if the tank is overfilled and is in the path to react before it hits the cap seal. Alas, not here...

patrickt 05-28-2021 04:20 PM
Well what's to stop this from happening again? It doesn't look like he has any drainage holes for little spills, or even a recessed area on the fender for it to safely pool . When I'm filling up with any of my cars I would say I spill some gas more often than not. I can remember one time with one of my cars that I spilled a lot, and I'm not even sure how I did it. But I pretty much ruined a nice pair of shoes and smelled like gas all day.%/

http://www.clubcobra.com/photopost/d.../gascap001.JPG

twobjshelbys 05-28-2021 05:50 PM
Comparing apples and oranges, I think, but possible hints. Bob, can you post a pic of the inside of your filler cap?

PatrickT has what looks like a traditional fuel filler neck inside the quick fill surround. In this case though the filler is recessed so overflow can sit in the ring around the quick fill.

Bob's on the other hand sits on the surface. So... If the construction is similar, gas expanding and getting past the gasket on the traditional fuel cap has a nice little place to puddle and seep past any pinhole that is in the sealant around the filler tube where it meets the quick fill cap. With the seal of the big cap, any gas sitting in that area can't evaporate, it'll just puddle and if there is a pinhole in the secondary sealing just keep looking for a way out.

I seem to recall that on my CSX the quick fill was "live" - the top had a gasket that sealed. It had a pretty good funnel-shape that would probably have held a good amount of expansion and any spillage would have been over the top of the cap. In Bob's case it looks like it came from around the bottom of the LeMans cap area and then found a way under the paint...

FredG 05-29-2021 10:19 AM
Yikes!! Another thing to worry about. Things like this reinforce the reason why I always pump my own gas and never try to top it off.

Moriarty 05-29-2021 11:29 AM
My ERA just has the flip-top lid, no cap inside. Is there a cap I should purchase, or would I need to do some more extensive work to add threads for it to screw into?

patrickt 05-29-2021 12:00 PM
Quote:
Originally Posted by Moriarty (Post 1493424)
My ERA just has the flip-top lid, no cap inside. Is there a cap I should purchase, or would I need to do some more extensive work to add threads for it to screw into?
Try a Parts Master 46139, which is a vented cap and pretty standard.

patrickt 05-29-2021 12:39 PM
Quote:
Originally Posted by patrickt (Post 1493426)
Try a Parts Master 46139, which is a vented cap and pretty standard.
... and I think that's the same as Stant 10810 that you can order off Amazon.

https://www.amazon.com/Stant-10810-F.../dp/B000B8LKZK

DanEC 05-29-2021 04:10 PM
I’ve heard of other evidence of fuel spills damaging paint in not too many years and it’s a mystery to me as urethane is pretty much standard anymore and should be undamaged by fuel. I’ve even flooded fuel over the back of my lacquer paint 66 Corvette but it didn’t damage it - wiped it down with a wet towel and drove home and waxed the area. It’s pretty much a habit with me anymore to carry a damp towel with me if I’m planning to stop for gas. I don’t understand how that type of damage happens??

34fords 05-29-2021 08:02 PM
As I said in post #2 I don't think that is pump gas. And as DanEC said, I to have had C2 Corvettes and motorcycles all my life and I spilled more gas on the Corvettes and bikes than I like to admit and I have never had anything like that happen. I have had the pain fade and get dull but nothing that wouldn't wax out.
I hope Bobcowan responds.

Lou1119 05-29-2021 09:51 PM
Quote:
Originally Posted by DanEC (Post 1493440)
I’ve heard of other evidence of fuel spills damaging paint in not too many years and it’s a mystery to me as urethane is pretty much standard anymore and should be undamaged by fuel. I’ve even flooded fuel over the back of my lacquer paint 66 Corvette but it didn’t damage it - wiped it down with a wet towel and drove home and waxed the area. It’s pretty much a habit with me anymore to carry a damp towel with me if I’m planning to stop for gas. I don’t understand how that type of damage happens??
I had paint damage from gas spilled on a 64 Corvette but that was in 1964. Paints were very different than today’s. It could be a poor job from the factory, if it were from pump gas.

DanEC 05-30-2021 06:34 AM
Good point about the factory - hadn’t noticed it was a Backdraft which is factory painted. I think I might have a discussion with the Backdraft representative - unless it was something other than fuel.


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