I'd never heard of that until yesterday when reading various leather care sites....it's recommended to do exactly that....let it sit in sun for 15 mins or use a hairdryer to heat up the leather. Zymol and Spinneybeck recommended it, but Connolly doesn't mention it. Couldn't find any reference from Mequiar's either.
- Warm the leather upholstery and trim using a household hair dryer or by leaving it exposed to the sun for 10 - 15 minutes.
- Apply zymol Treat evenly with a dry zymol terrycloth Applicator or Pre-Wax Applicator in small, even amounts, wiping in one direction only.
- Let it stand for 10 Minutes.
- Buff gently with a zymol Towel to a dry satin shine. Treat can be reapplied to severely worn leather upholstery and trim without fear of over-treatment.
http://www.leatherz.com/leathercare2.htm
AND, just for S&G ya gotta check out Zymol's site.........go through ALL 7 PAGES OF paint Products....OMG
.....$$$$$$$$$$$$$$$
http://www.zymol.com/paint-3.aspx
Keep a defibrillator close by......
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