Painting metal - Seeking advice and suggestions


I need to paint a metal door and some metal weights.
The door is already painted and in very good condition except where there are some nicks and scratches. The weights have been used over the past 20 years but are in decent condition.
My question is, do I have to take the door and weights down to shinny metal, prime and then paint, or can I maybe take the scratches down to bare metal, sand the rest of the paint, spray a primer and then a top coat. The weights are cast iron and only a few of the very oldest have even a haze of rust - easily removed with just a light sanding of 600 grit paper. The nicks in the door appear to stop at the primer or the color before the current color. But the paint doesn't have that look of having 1000s of layers on it.
Anyway, any suggestions on how to proceed? I would settle for minimal effort for the best look. I'd rather not send the items out to be acid dipped or spend a week stripping them with chemicals.
Thanks RC
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Just get the door smooth and free of rust. Primer (which will level things out), then paint. Krylon has a very nice line of paints for metal, etc. Also, their "Fusion" line bonds exceptionally well to old paint. It is for plastics, but seems to work well on metal. As to the dumbells, same story. Get off as much as you can. Since they will be banged about a bit, I'd see if you can find some spray epoxy paint, or the chip resistant paint like they use on bicycles. DuPont "Imron" comes to mind. That is likely overkill... Let us know how it comes out.
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wrote:

Thanks. I remember Imron from the "old" days as being top of the line car pain. I got the very paint you mentioned, Fusion for the Door and a Rust resistant primer and cheap paint for the weights. The weights are complete but I am waiting for them to cure. It might be over kill but I'm giving the a week are two. On the weight that looked the worst, I sanded. On the ones that had the paint intact, I just roughed up the surface and painted.
Re the guy suggesting taking the door to the auto shop, I have to wait until my Freezer comes back. I got the paint that changes color as you pass - orange-red-purple. The auto shop painted my Fridge in chamo and now I can't find it.
Thanks Propaul for the response.
RC
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Ron Cliiborn wrote:

For best results, take the door to an auto paint shop.
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