To answer the first question on another type or name of paint ,
i personally use an American paint called sherwin williams , (jet glow and acry glow top coats).
Their is not many products which come close for sheer shine and mirror finish from the gun (without polashing).
I see your an airline pilot ive painted many airline companies aircraft around Europe and as far away as Nigeria,
but thats another story ?
Thank you for posting a question by the way,
Areospace coatings nothing less
car paints do not hold the same flexable properties and will cause problems sooner rather than later.
These can be applied to most airframe surfaces without complication
Also i do hope you are kidding when you mentiond doing the job with a brush ,
Your aircraft should be treated like your ideal lady and work carried out 100% nothing less
Im not actually sure if i can give company details on this page so if you require further info drop me an e mail
I hope this has helped in some way and have fun ,
like you say if its not fun get someone else
All the best