this bike shown here i found in someones trash. all it needed was a new tire tube and some lube. works great, a little rough and shifting is tough but it runs fine.
the original color scheme shown below
Step 1: Find Tools
you may need wire cutters and pliers to remove cables.
you will need to acquire a chain tool if you wish to re-use the chain, otherwise, you will need to pry it off with force and have a new one installed.
so with that being said lets begin the painting process
Step 2: Unbolt EVERYTHING From the Frame
Start by taking the brake and derailleur cables out. simply loosen the bolt that the wire is pinned down with on the brakes and derailleur. then remove them, and disconnect them from the handlebars.
Depending on your bike, you may have to cut the clips holding the wire onto the frame, but some bikes have built in loops that the wire is guided through.
Then remove the brake mechanism themselves. the brake removal process may vary depending on your make and model of the bike. i am not a brake removal expert, but most brakes look like they come out when you unbolt them from the frame.
The same goes for the derailleur. It varies depending on the model. Many are bolted with the rear wheel along with an additional bolt to keep it from moving out of its proper position. In whatever case, this part is usually not hard to detach
Next you will want to remove the wheels. The back wheel will be a bit tricky because the chain will be caught on the rear cassette. if you have a chain tool, now is the time to use it to remove the chain, if not, leave the chain where it is while you remove the wheel, and we will explain how you can remove this shortly. The derailleur will remain attached to the chain, and i will also explain how this can be removed.
Proceed by removing the seat post, the rear rack if you have one, any reflector mounts, the handlebars, the pedals, and and Cyclometer wiring and sensor (if you have one of those as well).
Now you will need to remove the sprocket and fork from the frame. to remove the sprocket, you need to turn the bike to the side that the gear isnt on, and locate the bolt. you will need to turn this clockwise to remove it. make sure the pedals are off before the next step, or you will have trouble getting it out. Next, carefully remove the washer and bearings from the side you just unbolted, and snake the pedal-thingy through the hole out the other side. you will notice another bearing on the other side. remove this as well before painting. the fork will have a very similar design, except you turn the bolt counter clockwise. take note of the exact order of the bolts bearings and washers.
by now you should have a basic idea of how things fall into place on the frame. if there is anything i left out, take it off as well. the frame should not have any moving parts on it, or any bolts attached to it in any way whatsoever.
now put each set of bolts in separate plastic bags and label them with permanent marker. be sure to draw a diagram for things like bearings and washers and how they should go back in.
Now you will have to get the derailleur off the bike. to remove the chain, you can basically use any type of force to get it off, because without a chain tool, you will damage it trying to get it off in any other manner. i recommend pliers and a hammer to break the links in the chain. simply twist the chain in a manner that it shouldn't be twisted and after awhile it should come off just fine. then pull the chain scrap out of the derailleur.
now its time for the fun stuff
Step 3: Sand the Frame of Everything, Rust and Paint
another option is to sand using a belt sander.
you will want to get every bit of paint off or it will cause an uneven paint job if you leave spots like in the right side of this frame shown here.
it took me about 3 days to get all the paint off. but if you have a wire brush drill bit and a plug in drill, you should have it done within 2 or 3 hours. sand any other parts you want to paint. on this bike we painted the sprocket, the rear rack, the handlebars, the chain fender, and the brake mechanism. DO NOT paint bolts, chains, cables, or bearing systems. do not paint holes that the bolts go in, and do not paint the rear cassette (gears).
once you have you sanded parts ready, hang them somewhere (such as a garage ceiling), put any tarps down, and wait for a day with a humidity under 75%, otherwise painting will be miserable.
if you live near the ocean, try to avoid leaving the frame unpainted for more than a few days, as rust will form almost instantly from corrosive particles in the air.
Step 4: Hang and Paint
now comes the best part of the fun, painting. you will need 2 or 3 kinds of paint.
you will want to buy
-a rusty metal primer to stop and prevent rusting and corrosion
-a spray paint of the same type and company
-an optional clear coat for added protection
i recommend Rustoleum paint because a lot of people recommend it, and it stays on very well.
first you will have to prime, then paint, then put the clear coat on. always prime the suface first for it will keep the paint on longer.
if youve never spray painted before, the key is to put on several, super thin, layers-not thick slimy ones-
hold the can about 6 inches to 1 ft away from the part you are painting, and smoothly sweep up and down the part. you do not have to cover the entire object in the first coat. doing multiple coats helps the paint bond to the metal better. wait about 5 minutes, and then spray another light coat, being sure to give remote areas a little more attention. once you prime, go ahead and use the color of your choice to color that component in.
on this bike, i painted the frame and fork black, while painting everything else yellow, and did a gradient yellow/black on the bike's chain fender.
Step 5: Allow Drying for at Least 3 Days. More If Humidity Remains Above 70%
once fully dry you can re install parts while the bike is still suspended to prevent scratching from on-the-ground assembly. i got everything except the back wheel back on the bike while it was suspended.