The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Drip Rail Paint Cracking after 10 years a Restoration?

**HO455** · 01-20-2021, 11:10 PM

The cracking of the paint is likely from the paint and seam sealant having slightly different expansion rates causing cracks over time. Like metal paint will work harden and break after too many flexes. Ever time the temperature changes the thin film of paint must match the expansion or contraction of the material it is attached to.
MikeB's idea is sound. To help ensure good results careful masking off of the area prior to starting any repairs should make the end result a good one.

01-20-2021, 11:10 PM	#13
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,815	Re: Drip Rail Paint Cracking after 10 years a Restoration? The cracking of the paint is likely from the paint and seam sealant having slightly different expansion rates causing cracks over time. Like metal paint will work harden and break after too many flexes. Ever time the temperature changes the thin film of paint must match the expansion or contraction of the material it is attached to. MikeB's idea is sound. To help ensure good results careful masking off of the area prior to starting any repairs should make the end result a good one. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377