In Posers Group editor.

You can make a group; Bodywork.
Select all Poly's of the Blue bodywork.
Leave the bumpers and tires and so on alone.

And use Posers smoothing option for the bodywork group (the option is included in the Group edotor to do that.

Set crease angle to 180 for that Bodywork group only.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!