Difficulty
Hard
How to custom paint a bike
Want to jazz up an old frame? Here's how to upcycle your old bike with some custom detailing
James Howell-Jones
Junior Writer
Manon Lloyd
GCN Tech Presenter
The youngest, most successful and by far the coolest presenter
Is it easy to spray paint a bike frame?
Spray painting your bike is a great way of bringing a personal touch to your ride, but it can be daunting – between all the different stages of the process, from sanding, to priming, to painting, there are plenty of things that can go wrong
Step 1
Sandblast the frame to remove the old paint
If your frame is aluminium or steel, and it’s not corroded, you can get it stripped down to raw metal at a local sandblaster. It'll remove all the paint from your bike frame and stop all that paint dust from covering everything within a square mile of your garage or workshop.
Before you get it blasted, spend some time getting rid of any stickers, especially thick ones. If you leave them in place, they’ll absorb the energy of the fine sand particles, and you’ll end up with ridges and bumps in the surface of the frame.
Top Tip
Get it done properly! You can sand down a bike frame by hand, but there’s no point spending all day slaving away just to save £30/$40. You'll get a clean keyed surface for the paint to bond to and we guarantee it'll elevate the quality of all the custom detailing you do from this point on.
Step 2
Mask the frame and cover any contact points
Before you start spraying your primer, get the head tube, seat tube and bottom bracket masked. Paint on these areas won’t do you any favours.
Step 3
Apply your primer in a smooth even layer
For a smooth, even layer, the main thing is to keep a "wet edge" by keeping the can moving, pushing the paint along at the edges before they dry out and create lap marks. Paint off the end of each part of the frame to avoid thick spots of paint as you change direction.
Step 4
Sand the primer down and clean off the frame
For a really good finish, sand the primer down with some 600 grit sandpaper to get rid of any imperfections. Focus on getting a nice smooth surface and getting rid of any little bumps from the dry primer. Then, wash it down. First with some clean water, then with a pre-paint wipe.
Top Tip
Let it dry! Primers often need 12-24 hours time to "cure". Don't rush this step because you're in a hurry to feel channel your inner Banksy and get some colour on your newly sandblasted frame. You'll get bubbles and imperfections under your coats of paint and have to start all over again.
Step 5
Apply your coats of paint
It’s time to paint! The individual steps here will depend on what colours you’re using, but the technique is the same as it is for the primer. Keep the paint can moving, don’t let the paint run, but apply enough paint in each area to avoid a dimpled effect. Most paints require two coats of paint for a good coverage.
Step 6
Apply the clear lacquer
Finally, apply the clear coat. Most lacquers are bad for your lungs, so apply it outside and wear a mask. As with the paint, be careful to apply just the right amount to give good coverage without letting the lacquer run. Most lacquers require two or three coats, so follow the manufacturer's instructions to make sure you get the best results.
Top Tip
Wait for the lacquer to fully harden before you start touching, building or riding your frame.