I then applied a layer style to the bumper to give it a somewhat chrome effect.
Right, click on the 'bumper' layer and choose 'Blending Modes' to apply the following three captures.
Next I'll begin to add some of the fine lines that comprise of the doors and other areas.
Select the 'Pen Tool (P)' again, except, this time, up on the 'Options Bar' select 'Paths', as I have captured.
Create a new layer, and call it 'Lines'. This layer should be positioned uppermost in order for them to show.
So, Toolbar - Pen Tool selected, Options Bar - Paths selected, begin clicking/adding Anchor Points in the direction that comprises of the main passenger door.
More Tutorials: 
