These window trim pieces, for my 1927 coupe, have been blast cleaned by crushed glass. I intend to paint them by foam brush using Rust-Oleum Protective Enamel in gloss black. Do I need to prime them? I have Rust-Oleum Rusty Metal Primer that I could use. I am thinking that the advantage of using just one coat would reduce the chance of showing brush strokes.
The pieces have been hand sanded using 220 grit paper, except for the one on the right in the third photo and the last photo.
Do I Need To Prime These Parts
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BLB27
Topic author - Posts: 892
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Do I Need To Prime These Parts
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Russ T Fender
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Re: Do I Need To Prime These Parts
I use Rustoleum primer, filler first. It drys fast can be sanded to achieve a mirror finish when top coated with Rustoleum rattle can black, gloss enamel. I get great results and don't have to worry about brush strokes.
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speedytinc
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Re: Do I Need To Prime These Parts
That looks like a rough finish needing some build up & smoothing. If it were not rough, I would give it a coat of flat black spray paint as a base to help adhesion & finish coverage.
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speedytinc
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Re: Do I Need To Prime These Parts
If the above mentioned primer is dark grey or black - yes. If light grey. 
Any chips show up loudly.
Any chips show up loudly.-
BLB27
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Re: Do I Need To Prime These Parts
John, The 220 sanded areas are not rough.
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speedytinc
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TWrenn
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Re: Do I Need To Prime These Parts
Those pieces look kinda rough in the pics. Here's one of the interior trim pieces on my '25/'26 Fordor that were restored probably better than from factory new. The pic doesn't do them justice. Smooth as a baby's behind and shine like a mirror. Someone did an outstanding job on this entire car.
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BLB27
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Re: Do I Need To Prime These Parts
The piece on the right in the third photo has not been sanded and piece in the last photo has not been sanded.
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jiminbartow
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Re: Do I Need To Prime These Parts
Typical sandblast damage. You could sand a board with that rough surface! Awful!
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Steve Jelf
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Re: Do I Need To Prime These Parts
Yes, prime them. Use a very dark primer, like black, for the reason John mentioned. Sand with a fine grit (at least 800), and finish with your gloss black. I would use spray rather than brush.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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Allan
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Re: Do I Need To Prime These Parts
Unless the primer you use is somehow incompatible with subsequent top coats, I would always recommend s primer for a better job.
Allan from down under.
Allan from down under.
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BLB27
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Re: Do I Need To Prime These Parts
Pieces hand sanded with 220 grit and ready to prime. Smooth as a baby's behind. Can't sand wood with them now. Nice.
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John Codman
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Re: Do I Need To Prime These Parts
I agree with Steve. I would use Rust0leum appliance Black. In my opinion it has a smoother finish and brighter shine then the regular rust0leum.Steve Jelf wrote: ↑Wed Mar 02, 2022 1:34 amYes, prime them. Use a very dark primer, like black, for the reason John mentioned. Sand with a fine grit (at least 800), and finish with your gloss black. I would use spray rather than brush.