[SilverStreak] Painted Silver Streaks

[<MSC06USNret@xxxxxxx>]

I've recently seen a few Silver Streak trailers from the mid to late 1950s  
that are painted white on the outside.  This seems to be a factory applied  
paint.  Does anyone have any information regarding the years that might  have 
been painted and the reason for the outside painting?  thank you,  jim