How can I protect bare metal from rusting?

Question

I just worked hard to clean off the rust off my old motorcylce and I don't want it comming back.

I forgot to mention that it will not be covered by paint, so primer and paint are not viable answers.

Answer 1

Moisture + oxygen + metal = rust. You'll have to completely seal the metal to eliminate the reoccurence of rust. Use a premium surface coating like RustSeal by KBS Coatings. It's formulation allows it to seep deep down into the open metal pores & dry by drawing moisture out of the metal....curing into a rockhard nonporous coating.

Answer 2

Protect Metal From Rust

Answer 3

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That is a very good question that haunts every painter.Flash rust happens fast and needs to be prevented.For one thing,never prime bare metal without using an acid prep first,primer will not adhere properly without doing so.It will also remove any flash rust.This step is critical for long term success. Once properly prepared,coat the metal with a coat of primer to seal it up.Your rattle can primer idea will work if it's a quality sanding sealer type.On the next step after sanding the primer always treat any bare metal again,sanding it has destroyed the acid prepared surface.It is much better to use a 2 part primer now,the lacquer based primers now available are not durable.Obtain a bottle of a metal prep product and read the instructions carefully.

Answer 4

Nature abhors a vacuum. All metals exist in nature in mostly a form of oxide. Metals are refined with heat to drive the oxygen off and reduce the material to a base metal, iron, for example goes into a smelter as iron oxide and comes out as slag and molten metal iron. Once the iron is in contact with the oxygen in the atmosphere, nature starts turning it back into the oxide form and there is NOTHING you can do to stop the process, only SLOW it down.. All metals exposed to the atmosphere (and water vapor) are oxidizing all of the time. The only difference is the rate at which it happens. The more cohesive the oxide layer on the surface, like with gold or stainless steel, the very tight layer acts to separate the base metal from the environment. The oxide layers on gold and stainless steel are so thin that light gets through, which is why they stay bright, and why an active metal like pure iron rapidly gets covered in red rust, which happens to be a very loose layer which barely slows down the process. So, if you are not prepared to paint the bare metal or cover with a clear laquer or some such to keep the air from the base metal, then you are in for hours and hours of pleasure scraping off that red rest which nature insists on making. Unless you separate the base metal from the atmosphere, you are going to have to live with the rust coming back.

Answer 5

Have an original GM 2 barrel cast iron intake for 350, I paint stripped the old peeling GM Blue enamel and went over it with an electric stainless wire brush until all the rust was removed. It left a shiney finish on the cast iron.

After reinstalling on the engine, I coated it with thin layer of gear oil with a part cleaning brush. I will periodically has to clean the intake with a solvent and reapply gear oil to prevent the rust, but it looks cool in raw cast iron. PH

Answer 6

It is a given fact that bare metal will rust. You must spray it with a primer or do not expect it to not rust. You can go to your parts store or paint shop and buy a rattle can of self etch primer. Apply 2 coats.

Answer 7

If chrome parts, you'll need to rechrome them...painted surfaces, you get a good primer, then finish coat twice "light" coats.

Motorcycles need to be disassembled to completely repaint, but small spots can come out ok, if you are carefull and mask off areas you don't want paint on.

Answer 8

Prime it, paint it, clear coat it? What else...
However, if you didn't sand it properly and you left a bit of rust here and there it will come back in no time.

Answer 9

There are a ton of different products you can just spray on to protect your bike. There is a new website, www.corrosionconnection.com and it has a whole section on motorcycles under the auto section, maybe it can help you! Good luck

Answer 10

Prime it, if you are not ready for that you could try putting a thin coat of oil on it all. The oil will need to be removed before painting however.

Best of Luck!