Hi BirdDog,
Cautionary tail;
I refurbished my first aircraft In/Out including painting. I did the research and settled on a US company called Stewart Systems (https://stewartsystems.aero/). There were several reasons;
Great reviews & videos
Water born - less toxic
Terrific how to instructions
Certified for aircraft use
Down side - costly!
Perhaps unusual for me (a male) I actually followed the very detailed instructions. I was delighted with the result. To my eye, pretty close to a professional finish.
I replaced the above, composite, aircraft with an almost completed all metal Sonex.
The almost completed description, included most of the aircraft being undercoated. ( PPG Industries DeSoto 515X349).
Over the next 12 months the remaining fabrication, installation was completed, in the period just after CV19 pandemic- time to do the topcoat paint.
After my first aircraft painting success I was going to do the job myself.
The paint I wanted was not available anywhere in Australia - next delivery ???????
My eldest Son (a CPL) persuaded me to engage the services of friend, who has a custom automotive paint business, has his own temperature controlled, down draft, spray booth (Mates Rates!)
With no paint from the prefered supplier I went to the Mate - he directed me to his supplier, PPG.
Trotted down to the local PPG stockist "Paint Powerhouse". After consulting with them, I went with PPG Industries Protec White.
The Mate did a great job. Sonex looked a million dollars.
Now, about 3 years later - Top & undercoat is lifting in neat little circles off rivet heads. Top coat is flaking, in other areas, leaving the undercoat. Sonex is starting to look a little rough.
PPG refuse to inspect the work (I have to engage an independent paint assessor $$$) but have hinted that ;
The bulk of the surface preparation, for the undercoat, was correctly applied, the rivets heads were likly not.
The time between undercut & top coat applications was excessive (years) which would have required more intensive preparation (abrasion) than may have been done.
PPG Industries Protec White is not listed as a suitable top coat over PPG Industries DeSoto 515X349.
I should have been directed to their Aircraft paint division (didn't know they had one)
The only long term solution is a complete bear metal paint strip & repaint from scratch. As an amature, I think I would likly have done a more in depth surface preparation, than the professional, who likly made some understandable assumptions. My top coat application may not have been so professional but could not have been worse than what I have now. A cheap job, that will be a costly one to fix.
None of this effects the aircrafts excellent performance but is a bit cringeworthy at a fly-in.
If you happen to fly into Wedderburn/Napper Field - check out Peter (Overalls) RV4 - The first (?) in Australia, still in its originality paint job - looks new.
So my advice - DO YOUR RESEARCH - TAKE YOUR TIME - CHECK OUT EXAMPLES OF YOUR PAINTER SHORT LIST
π