The 2.4 on reverb has not been painted by Thiel so approach with caution.
If one was paint Thiel speakers I would think they would preserve the legendary Thiel look. Painting the black baffles white like the rest of the speaker is not a good look. It’s a short cut as you would have to tape in two parts and mix two colors of paint to do it correctly. Short cutting here tells the rest of the story.
Look at the paint in photo below the binding posts. I have factory white Thiel 2.7 and they do not look like this.
They will need to be sanded (Pair on Reverb) and prep’d for paint. Dont skimp on paint quality and get a high grade automotive paint, about $200-$300 per quart. Same for primer. A good epoxy primer would be my choice for first coat.
You will need a pair of coaxial drivers as they look pretty beat up.
The pair for sale I would offer around $1500 as you will have at least $1500 in getiing them to look respectable.
They was a pair of 3.7 on US Audiomart, I believe, that were painted black. It looked like soneone used a paint brush as they looked hideous. They were in CA and I’m on east coast and I could not work a deal to get them to save them. No boxes and an unwillingness from seller to ship closed that door.
My point is Thiel speakers are worth restoring/upgrading. It has been said here and I’ll reinforce that now. "You will spend a significantly amount of money to better them" .
With all the support and upgrade recommendations that Tom Thiel has for these speakers, you will have a clear upgrade path to squeeze greater sonic gain from them.