I wanna strip down my bike and take off all the paint... im thinking of leaving it just the steal color... Do i need to put anythinng on the steel to coat it or can i just leave it like that... Will it rust or anything?
It will rust but there is a product called POR that comes in clear, it will stop rust almost forever. If you don't want to go to that expense then rinse it down with acid. Ask at an automotive paint store for it.
If it's stainless steel or aluminum, it won't rust. Chances are the bike parts that have been painted are of metals that will rust. If you like the metal color, then you can get paints that look like metal or you can clear coat it. You might want to consider just a grey primer.
It depends on the steel, assuming your bike isn't aluminum. Since your bike isn't likely made of stainless steel or weathering steel, it really ought to be protected from the elements. You can do this in different ways. I've seen bare metal last many years in the weather with a regular dousing of oil. I've even seen a guy just pour his used motor oil over his battered old truck. Now don't be misled - the truck looked like hot buttered hell, but the steel was all good on a fifty year old truck. Those are real world results and if you don't mind the oil staining the inner thighs of your pants so it looks like you had an accident on the way to wherever, it's an option. Or you can paint it back, only in clear coat.
There is another thing you can do to inhibit corrosion on bare metal surfaces. Use a good quality automotive wax. Apply it with diligence, and keep the bike in the garage when you're not using it so it stays dry. Touch up the wax job every now and then to maintain the protective finnish.
