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Sprsying /Painting engine

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gtmdriver:

--- Quote from: moorey on November 25, 2017, 04:17:57 PM ---Did you use POR 15 metal prep on the aluminium.

--- End quote ---

Since I had the engine in bits I could do a real thorough job.

I degreased the parts using old style Jizer then removed the corrosion using Clarks Alloy Cleaner (Machine Mart).

I put all the parts through a hot cycle in the dishwasher then used POR15 Metal Ready (now Metal Prep) before spraying them with thinned POR15 Engine Enamel.

mike the bike:
How about using a hot air gun to set the paint;  would that work?

Rob62:

--- Quote from: hairygit on November 26, 2017, 02:06:39 PM ---
--- Quote from: adriangsmith on November 26, 2017, 12:56:47 PM ---used simonez engine enamel.
Be careful to bake it out at 200C to fully cure it. you'll find this with most engine enamels.
I've found htat curing by running the engine does not always work.

--- End quote ---
So not a lot of good for the original poster's question on spraying a complete engine, as even if you could find an oven big enough to hold a complete Honda four engine, I wouldn't rate the chances of the oil seals putting up with that level of heat for long! ;)

--- End quote ---

Well said, i was thinking the same thing.. I’m pretty sure curung the paint with the motor running will be ok, never had any real problems in the past...

Moorey:
According to the blurb for por15 engine enamel there is no baking required it air cures.
Apply in well-ventilated area only. Ideal ambient temperature for application is 70°F,
but an acceptable temperature range is between 50-80°F. Mix POR-15® Engine
Enamel by stirring only. Do not shake. POR-15® Engine Enamel can usually be brushed
without thinning. A full coat will usually cover but if a second coat is needed, apply
when first coat is dry to the touch (no finger drag) and within 24 hours of first coat.
Dry Time: Wait 4-6 days before starting engine.
Previously Finished or Primed Surfaces: Using POR-15® Cleaner Degreaser
ensure that the surface is clean, dry, and free from oil, grease, dirt, salts, and any other
contaminants. All blistered and loose paint must be removed. Glossy surfaces should
be roughened with 320 grit before recoating.

gtmdriver:
All correct.

POR15 Engine Enamel doesn't need to be heat cured but I found that it had a poor finish when brushed on.

Very streaky and uneven. That's why I thinned and sprayed it.

You may be happy with the brushed finish especially if you buy a good brush for the job.

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