Coastline

Probably not prepped properly in at least that spot or could be that between coats the paint was not given enough time to "flash", or set-up. You might look closely all around the body and see if there are other fine lines starting to appear...

Is the paint single stage urethane or two stage base coat with clear coat?

I don't know what the Irwindale shop used but I probably used 6011. I worked in the dirt and then several years in sand and gravel, batch plants. I used a rosebud or scarfing tip - whatever was available for maximum torch heat - to pre heat the...

Way back in the yester-year I rebuilt an early Volvo ('67?) and it developed cracks in the manifold. The trick I learned from an outfit in Irwindale was to to preheat the cast iron manifold in an oven, super hot, and then weld it, cool slowly...