Did some digging around and found a Brightside document that references use at low temperatures, i.e, 5 deg C (40 F). Had not seen any reference to use under 50 deg prior to this. The document is dated 12/06.
http://www.cpbsupply.com/paint/pdfs/international_brightside.pdf

I'm still using Brightside (Hatteras Off White 1990). I finished my truck in October, there are pix on the list. Today I applied my 4th and final coat to my truck cap (probably last warm day of the year- no garage). Note the 2 pictures of the curved surface on the rear of the truck. I was able to get that finish w/o polishing, no wax (used 800 grit between coats). Can't say the rest of the truck is that good, but this is what you 'can' get if you work with a lot of care. Brightside is great.


Mitch