Some aerosols are already banned for under-16's because they contain chemicals which are harmful.
But a complete ban would mean that people under 18 wouldn't be able to buy any of these items without an adult present.
And as Dave Evans from Halfords points out: "Many children use spray paints for legitimate reasons, like spraying their bikes and model aeroplanes. Not all of them will buy paints for graffiti."
Many people have strong opinions about graffiti.
Some people think its cool and those into graffiti think it should be seen as art.
Whereas others think it's vandalism that spoils the look of a community.
Most graffiti is found in places where it shouldn't be - and that's part of the challenge for the artists.