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#1
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Olds original paint thickness
Can someone tell me how mils or millimeters the original paint should be on a 70 W30? Hood, doors, trunk, roof etc? Or just a range
Thanks Lawrence
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65 Corvette Coupe L78 67 427/390 Vette Coupe unrestored 67 L-79 Vette roadster (Top Flight) 69 L71 Roadster Survivor 69 L46 Roadster Survivor (Sold) 69 Z/28 RS 69 Dodge Charger R/T 70 W30 442 Auto Air Survivor 2016 Z06 Coupe M7 70 AAR Cuda (Sold) 69 L78 Chevelle |
#2
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Just did some vintage certification judging at MCACNon a 69 Hurst Olds and a 70 W31.
First off,hood can’t be gauged because it’s fiberglass. Paint ranges over the entire car extend to a low of 2.5 at the bottom of doors and quarters to 5.5 on flat panels like trunk and sides of roof and fender tops. Keep in mind there were no robotics when there cars were painted new and there will be spray patern variances. A good example of this is at the ends of the quarter panels were we found depths of 7mm due to end of spray patern. As front clips were painted at Lansing separate from the body you may find inconsistencies between the front fenders and doors. Additionally you will find the stripes fairly consistent but surprisingly not much thicker that the paint around them. Paul Martin Vintage Certification Team MCACN 2013 to present.
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1971 W30 convert, triple green,second owner. 1971 W30 Convert, special order Rally red, under resto. 68 Charger R/T, Bullitt Replica 68 Camaro Z28,Corvette Bronze,Houndstooth www.vancouverclassiccars.com Last edited by Canuck; 12-17-2018 at 03:28 AM. |
#3
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Paul
Thanks for the info. So I need to be measuring in millimeters? Thanks
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65 Corvette Coupe L78 67 427/390 Vette Coupe unrestored 67 L-79 Vette roadster (Top Flight) 69 L71 Roadster Survivor 69 L46 Roadster Survivor (Sold) 69 Z/28 RS 69 Dodge Charger R/T 70 W30 442 Auto Air Survivor 2016 Z06 Coupe M7 70 AAR Cuda (Sold) 69 L78 Chevelle |
#4
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The paint depth guages will measure in mm.
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1971 W30 convert, triple green,second owner. 1971 W30 Convert, special order Rally red, under resto. 68 Charger R/T, Bullitt Replica 68 Camaro Z28,Corvette Bronze,Houndstooth www.vancouverclassiccars.com |
#5
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Fiberglass and urethane bumpers can be gauged with the newer gauges, similar to a sonogram. New vehicles with sensors in the bumper don’t work properly with excess paint and need to be gauged after being painted.
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The Following User Says Thank You to bluel78 For This Useful Post: | ||
firstgenaddict (12-17-2018) |
#6
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"A good example of this is at the ends of the quarter panels were we found depths of 7mm due to end of spray patern."
Just to offer some clarification...1 mil = .001"...or one-thousandth of an inch. Coating thickness is typically measured in mils which should not be confused with millimeters (mm). 7mm would be the equivalent of .276"...or more than 1/4". However, I do agree with Paul's overall and I use 3.5-4.0 mils as a target nominal. Due to spray patterns, I've see upwards of 6 mils and anything over 6.0 mils is cause for further scrutiny.
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Steve Nuwer 1970 Z28, Norwood 03A, 48 48, 723 Int, M20, COO, 2021 Legends Platinum restored 1970 L78, Norwood 04C, 17 17, 711 Int, M21, COO, born-with drivetrain project. 1972 Z28, Norwood 11C project, born-with drivetrain, 26 26, 775, M20, CGG project 1970 Z28, Norwood 05C, 48 G, 720 Int, M21, COZ, Original Unrestored (SOLD) www.2ndGenZ.com |
The Following User Says Thank You to L16pilot For This Useful Post: | ||
jerry455 (12-17-2018) |
#7
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Quote:
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1971 W30 convert, triple green,second owner. 1971 W30 Convert, special order Rally red, under resto. 68 Charger R/T, Bullitt Replica 68 Camaro Z28,Corvette Bronze,Houndstooth www.vancouverclassiccars.com |
#8
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Great info guys!!
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1969 Camaro RS/SS Azure Turquoise 1969 Camaro Z/28 Azure Turquoise 1984 Camaro z/28 L69 HO 5 speed 1984 Camaro z/28 zz4 conversion 1987 Monte Carlo SS original owner |
#9
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...as a post-script...I use 3.5-4.0 mils as a nominal for GM lacquer. Not sure what others use for enamel which I believe was used by FoMoCo and Chrysler during the 60s-70s. Would like to hear others chime in with experience on factory enamel paint thickness.
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Steve Nuwer 1970 Z28, Norwood 03A, 48 48, 723 Int, M20, COO, 2021 Legends Platinum restored 1970 L78, Norwood 04C, 17 17, 711 Int, M21, COO, born-with drivetrain project. 1972 Z28, Norwood 11C project, born-with drivetrain, 26 26, 775, M20, CGG project 1970 Z28, Norwood 05C, 48 G, 720 Int, M21, COZ, Original Unrestored (SOLD) www.2ndGenZ.com |
#10
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I thought Mopars and Fords were a lot thicker because of the brush strokes
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