Step 2: Assembly of the bike
Be careful the paint might feel dry but most of the time it still needs to harden.
Before you put any part back on your bike you remove all the grease and rust .
I general give every part a nice shine.
If you think that rust will come back after a while just clean it and paint it with a clear coat that will make the bike stand the test of time a bit longer.
Some parts are just too ugly or damaged to repair so you will have to buy some new parts ( i mostly still change small things on the parts i buy to make it fit the general style of the bicycle).
It also helps if you replace worn down parts like old bearrings and give everything that needs it some new grease.