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Re: Recommended finish for barrel and head

I use Pot Belly Black, as you might gather it comes from a wood heater shop.
I would expect BBQ black is some what similar.
Comes in gloss & matt but the gloss will go matt over time.
The trick is a lot of very light coats some time as many as 12 of them.

What paint as we all know dries from the outside in what most people fail to understand is that in order for the paint that is under the skin to dry the solvent has to escape and it does so by making little tunnels.
Now because gasses came out of these tunnels, moisture can get in via the said same tunnels.
Thus the more coats you put on the less chance of any of these tunnels joining up to make a path all the way back to the metal base.
The mechanism is exactly the same with 2 pack where you have 2 liquids reacting with each other to make a solid & a gas and that gas has to go somewhere and in going somewhere leaves a tunnel behind it.
The thinner the coat, the less gas that there is to escape the fewer the pathways from the bottom of the coating to the outside.

Most people put heat proof coatings on way way way way too thick and put second coats on too early.
Also the colder & slower the paint dries the better.

email (option): bsansw1@tpg.com.au

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