Printed a 68 GTO rear hood bumper with an encapsulated washer. The repops don't have the metal washer in them so are basically useless, you but a screw in them and snug it down, it just pushes the rubber out of the way and you can pull it off the car quite easily by hand. The OEM pieces had the metal washer in them.
Here is the print paused so I can put the washer in place:
Dropped the washer in place:
Here the print is finished and you can see the washer encapsulated in the bottom of the bumper.
Here is the printed part next to a repop .. the repop had to be trimmed down on the top because it was taller than the original OEM piece.
Here is a cross section view of the CAD file show the cavity I put the washer in.
Made some errors in the G-code for the print pause, next example should print out better. Also this has the wrong size washer in it, the washer hole should be smaller than the hole through the bumper ... didn't have the right washer in stock.