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Priming/Painting
The garage needs to be about 15 to 20 degrees C to spray and definitely not a misty or foggy day as the paint as it dries will absorb moisture from the atmosphere and the paint will “bloom”. If you overspray “bloomed paint” it often comes through to the latest coat.
Put your rattle cans in a bowl of hot water for 5minutes before shaking them for the required 2 minutes, back in the hot water for a minute then spray from them
If I was doing it again I would have an engine stand where I could rotate the engine as it is virtually impossible to get paint to cover the really difficult places (vertical cylinder base gasket area near the exhaust port, horizontal cylinder in the middle of the vee and above the oil filter). You need gravity to get the complete coverage in those areas.
Do the very difficult areas (interior corners) first and let that paint dry before moving onto the easier areas. Do the exterior corners next and let that dry then do the plain flat bits last (the bits that tend to show the most).
Do not try to eke out the last bit from the rattle cans it always comes out thicker or in globules and is much more likely to cause runs.
I tried to put a few light dusting coats to ensure full coverage on first with 20 – 60 minutes between coats then when those had all dried get a fresh can and put the wet coat on, a bit thicker but not so as to cause runs.
Runs cannot be sprayed out, they have to be rubbed down and re done or lived with depending where on the cases the run is.
If you are going to rub down runs leave at least 3 days for the paint to harden before tackling them
Hope this helps
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