I thought all of the manufactures painted the assembly line engines without primer? Seems the original engine paint held up without primer first.......sure is a pain to remove 40-50 year old factory engine paint down to the bare metal, must be the prep before paint?
Like All solvent based products today, there's no comparison with older products. Be it Paint, Paint Remover, Drain/Household Cleaners, etc. Many of the components used are not used anymore, are banned/restricted, or substituted with lesser types.
