Originally Posted by minaret
No primer? No acid etch? Doomed to failure. Can't paint
cold metal either. Must be dry and warm. Primer must be applied within 45 minutes of abrasion and final cleaning
. Blow all that paint
off with a pressure washer and start over.
+1 to minaret's advice.
If you're stuck with painting in situ the key is to ensure all rust, dirt and oil
is removed. With an acid or caustic cleaned block this is pretty straight forward. MEK or Toluene always worked well. You can tell if its clean by wiping with a white cloth. Any dirt will lift
A good high gloss enamel always works well. Most engines have quite rough castings and some porosity so enamel laid on thick is the key.
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