Ok, single stage vs. two stage paint jobs.
Single stage jobs are generally cheaper since you only need to spray the color paint which is glossy and you're done. Two stage is the color paint which is usually a basecoat and is flat. Then clearcoat is applied on the top and gives it the gloss.
Both paint jobs can be sanded and buffed to a gorgeous finish but a clearcoat paint job can be made to look like glass. The clearcoat usually has UV protection to prevent paint fading.
The single stage paint job usually takes a lot of beating from the sun, especially a black color so having clearcoat on top of the base color can save you some headaches down the road.
I would go with the 2 stage paint job on the sidecar. It's a little more expensive but worth it in the long run and here's the thing, I generally price out paint per gallon for vehicles. The paint shop can paint that sidecar with 1 quart of black...or less, one pint of orange, and one quart of clearcoat so the price of the material will be around $300. Use that as a baseline if they try to charge you $2000 for a paintjob.
[This message has been edited by IMSA GT (edited 08-23-2025).]