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04-03-2015, 12:20 PM | #1 |
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Best primer for painting cast iron parts
Is a primer needed for cast iron parts (like engine castings), and if so, which one is best?
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04-03-2015, 01:43 PM | #2 |
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Re: Best primer for painting cast iron parts
I generally do not prime my cast iron. I like to gently warm cast iron with a torch and paint it warm. If using a brush mix some Penetrol with your paint. It will make it flow well and take out any brush marks. Looks just like you shot it with a paint gun.
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04-03-2015, 02:05 PM | #3 |
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Re: Best primer for painting cast iron parts
I am going to use the spray version of the green engine paint I got from a parts supplier.
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04-03-2015, 04:03 PM | #4 |
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Re: Best primer for painting cast iron parts
What cast parts are you going to paint green? Some of the parts may have been originally black. But, in-the-end, it's what every you like. Have fun, Bill
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04-03-2015, 04:10 PM | #5 |
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Re: Best primer for painting cast iron parts
I use zinc chromate primer on freshly blasted parts.
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04-03-2015, 04:29 PM | #6 |
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Re: Best primer for painting cast iron parts
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04-03-2015, 05:07 PM | #7 |
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Re: Best primer for painting cast iron parts
If you are painting your block, you do not need to prime before painting with engine paint.
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04-03-2015, 05:09 PM | #8 |
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Re: Best primer for painting cast iron parts
I don't prime the cast iron. If you warm the cast iron, you're better off to use an electric heat gun or hair drier. A torch produces moisture on cooler parts.
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04-03-2015, 05:32 PM | #9 |
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Re: Best primer for painting cast iron parts
I used that Green Rattle Paint from the Vendors on my engine before I put it all together. Just did a normal wash, dry, then degreased it thoroughly, I did warmed it with heat lamps so the block was warmed first. Not sure if I had too, but the shop was cool. Came out good, no issues at all. Surprised how fast it dried.
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04-03-2015, 07:39 PM | #10 |
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Re: Best primer for painting cast iron parts
I'll try warming the parts with a hair dryer (or in the oven if my wife isn't looking!). They are the timing gear cover and inspection plate. They have been sandblasted so I think the paint should stick well.
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04-03-2015, 08:21 PM | #11 |
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Re: Best primer for painting cast iron parts
Cast timing gear cover is green and the stamped steel plate is black.
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04-03-2015, 08:24 PM | #12 |
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Re: Best primer for painting cast iron parts
Sparky, I use infra-red heat lamps. They work great.
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04-03-2015, 08:54 PM | #13 |
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Re: Best primer for painting cast iron parts
On ANY parts I paint, I scrub them with T.S.P. first. It etches any old paint, to get a better bond.
Bill W.
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04-03-2015, 08:59 PM | #14 |
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Re: Best primer for painting cast iron parts
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04-03-2015, 10:13 PM | #15 |
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Re: Best primer for painting cast iron parts
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04-03-2015, 10:36 PM | #16 |
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Re: Best primer for painting cast iron parts
Add me to the tsp and no primer on cast iron parts. TSP to kill the rust and paint as normal.
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04-04-2015, 01:23 PM | #17 |
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Re: Best primer for painting cast iron parts
Just one (1) Model A Opinion:
1. Just observe a few Model A engines that have been painted recently. 2. The thin paint edges on the rough cast iron vertical surfaces, where the head meets the block on the perimeter of the head gasket, is where paint failure begins above & below the head gasket in a short time period. 3. If you ever want to avoid rust from beginning at this joint, use POR Marine Clean with POR instructions, POR 15 Primer, & POR Engine Paint. 4. Non-Prorated Lifetime Guarantee: Shortly after the Pharaohs return to their pyramids in Egypt to eat the wheat left in their tombs in 5,000 BC, they can drop by your house .......... pick up your Model A .......... & witness an engine block that looks like it was painted yesterday. |
04-04-2015, 09:00 PM | #18 |
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Re: Best primer for painting cast iron parts
Rustoleum, rusty metal primer. It's the best
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04-04-2015, 09:03 PM | #19 |
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Re: Best primer for painting cast iron parts
H.L. I think i saw a pharaoh in New Orleans last year. Might have been eating Louisiana rice.
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04-05-2015, 01:22 AM | #20 |
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Re: Best primer for painting cast iron parts
Hi Curt,
Correct ....... it was rice ............. but, the rice was cooked with meat ...... known as Jambalaya. After he ate it .......... this Pharaoh then marveled at how much he liked it & wanted more ......... that is, until the cook told him he made the Jambalaya with only the very best lean, Iowa Corn-Fed "Pork". Poor pharaoh .......... we heard he almost became totally mummified when he found out that he ate Pork .... he did not even try to fulfill his main mission of checking out the POR 15 paint job on the Model A cast iron engine block .............. which really looked great with the very old POR 15. We heard he just hurriedly grabbed a taxi & booked the very next flight back to Cairo. If he returns within the next 5,000 years, no doubt the POR will still look good with no rust by the head gasket. Thanks for the serious reply ............ and, you do have a very good memory! |
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