Extended warranties are never a good buy on pretty much anything. It's just another way to separate you from as much money as possible. Same for the paint treatment and interior treatment. These are where dealers make a lot of money. And if you fiance the warranties or the rest you pay interest on that for the life of the loan, another bad idea. From a personal point of view. I never bought any of that stuff and never needed it and I've been buying new cars since 1975.
FoMoCo cars I've owned
1970 429 Cyclone, 1978 LTD II 302, 1980 Fiesta 2nd best Ford I've owned
1986 Tempo LX, 1990 Areostar,1996 Areostar Best vehicle I've ever owned
2005 Ford 500, 2006 Freestyle, 2012 Focus Titanium pearl white