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Like @danstuff said; the airbrush will get you there but it will take a long time.
The Sealey gun he mentioned is a good entry-level tool.
These are also pretty good - https://cosmicrons.com/products/1-0mm-hvlp-paint-spray-gun
It was my first gun, now I use it for base occasionally or lending it to people.Painters can't all agree on the 'best' gun but the higher end offerings from SATA/DeVilbiss/Iwata are the industry standard. The SATA minijet is our go-to gun at Cole Coatings Workshop. We use slightly cheaper DeVilbiss SRi guns for primer.
An idea of how we use different nozzle sizes... very loosely...
0.2/0.35 - Localised airbrush fine detail
0.5 - Larger airbrush block colour
0.5 - Blends/fades
0.8 - Base
1.0 - Base/Primer
1.0 - Clear
1.2 - Clear
There are a few guns above 2.0 that we use for flake and other specialist finishes.If you're going to do more than one bike, it's worth investing in three dedicated guns... primer/base/clear. In order, it should be cheap/more expensive/best gun.
I'd urge you away from rattle cans for three reasons.
Firstly, they're not as effective as custom mixed products; sure, they work, but your finishes will be more robust if you use 'proper' product.
Secondly, it will be more gun practice for you, without consequence. If you make a mistake in primer, it's relatively easy to remedy.
Third, if you're going to use an epoxy primer (which we do in the most part because of it's excellent adhesion properties), the viscosity and application technique is quite similar to spraying clearcoat which is arguably the most difficult part of the process so any extra practice here is useful.You can buy a hundred quid's worth of compressor from Screwfix and that'll do the job well enough.
If you're interested in getting to grips with the tools and processes, and more importantly, the prep stages, we offer courses at our workshop throughout the year. There's a 10% forum discount too. https://colecoatingsworkshop.com/courses/
Hope that's all useful information.
Yer i guess it may be best to get a touch-up gun instead im guessing i would need a compressor that can handle a higher cfm too. Will have a look around want something that is not going to blow my eardrums like my grandparents old one.