question for owner of an original +73 C3
12-28-2010, 03:02 PM
#1
Melting Slicks
Thread Starter
question for owner of an original +73 C3
I'm having my car painted right now and one of the problems we are still trying to get rid of is what is called 'ghostlining'. Essentially this is the body seam showing through in the paint when the car gets heated.
At first I thought it was only related to the bonding paste i used in repairs, but apparently the original seams show through as well when the car is put in the heated paint booth. The disappear as the car cools down.
Did you guys notice this on your original cars as well, for example when they are out in the hot son. This must especially noticable on a dark colored car.
PS : don't ask me for pictures, because this is difficult to capture on a camera.
At first I thought it was only related to the bonding paste i used in repairs, but apparently the original seams show through as well when the car is put in the heated paint booth. The disappear as the car cools down.
Did you guys notice this on your original cars as well, for example when they are out in the hot son. This must especially noticable on a dark colored car.
PS : don't ask me for pictures, because this is difficult to capture on a camera.
12-28-2010, 03:34 PM
#2
Drifting
I haven't seen it on my '73 and we have hot weather here in Dallas. Sure would like to see pic's of your '73...not of the issue you're talking about, but just of your car in general. What color you going with?
12-28-2010, 03:41 PM
#3
Melting Slicks
Thread Starter
My car is not even ready so i have not really something to show for.
12-28-2010, 04:02 PM
#4
Team Owner
Member Since: Sep 2006
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Hi B79,
My understanding is that even in the 71 model year the bodies were a combination of the original glass and smc.
The method of dealing with the seams that seems to have the highest success rate is to grind out the various seams into a wide 'v' shape and then fill the 'v' with tapered layers of mat and resin using NO filler to finish. This helps eliminate the heat caused shrinkage of different materials from showing through the paint.
Regards,
Alan
My understanding is that even in the 71 model year the bodies were a combination of the original glass and smc.
The method of dealing with the seams that seems to have the highest success rate is to grind out the various seams into a wide 'v' shape and then fill the 'v' with tapered layers of mat and resin using NO filler to finish. This helps eliminate the heat caused shrinkage of different materials from showing through the paint.
Regards,
Alan
12-28-2010, 04:10 PM
#5
Melting Slicks
Thread Starter
Hi B79,
My understanding is that even in the 71 model year the bodies were a combination of the original glass and smc.
The method of dealing with the seams that seems to have the highest success rate is to grind out the various seams into a wide 'v' shape and then fill the 'v' with tapered layers of mat and resin using NO filler to finish. This helps eliminate the heat caused shrinkage of different materials from showing through the paint.
Regards,
Alan
My understanding is that even in the 71 model year the bodies were a combination of the original glass and smc.
The method of dealing with the seams that seems to have the highest success rate is to grind out the various seams into a wide 'v' shape and then fill the 'v' with tapered layers of mat and resin using NO filler to finish. This helps eliminate the heat caused shrinkage of different materials from showing through the paint.
Regards,
Alan
Highest rate, does this mean it doesn't always succeed ?
12-29-2010, 04:41 PM
#6
Team Owner
Member Since: Sep 2006
Location: Westminster Maryland
Posts: 30,173
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Hi,
Is ANYTHING 100% sure?
For instance, there could be a tiny hidden air bubble in the resin that might cause troubles later.
My car was painted about 5 years ago.... no seams showing through yet.
For many people who want a paint job it's too much work and therefore too many $$$.
Regards,
Alan
Is ANYTHING 100% sure?
For instance, there could be a tiny hidden air bubble in the resin that might cause troubles later.
My car was painted about 5 years ago.... no seams showing through yet.
For many people who want a paint job it's too much work and therefore too many $$$.
Regards,
Alan
12-30-2010, 02:26 PM
#8
Melting Slicks
Thread Starter
The thing is that is has something to do with the expansion rates of the materials being different. I don't see a layer of gelcoat taking up that expansion, but who knows...there were more things about these cars I would see possible.
