fabricate the covers.

First I bend some very small gauge tubing so it just fits inside the opening. Then I create a paper template for the cover. This template is larger than the wire frame as it needs to extend beyond the the area to be covered to attach to the bodywork and top of the dashboard. Then you spray the paper with a bit of glue and attach it to a piece of cloth. You cut the cloth even with the paper on all sides except the side that faces the driver. You leave some extra there so it can be folded around the tube frame. You glue the frame to the underside of the cloth positioned so the edge facing the driver is flush to the edge of the paper then use a bit of glue to wrap around that tube section trimming the cloth so it does not extend outside the tube framework that will butt with the dash or the rear deck.

Now you fit it in place. The reason for the tube framework now becomes apparent. You can bend the tubes so they conform to the curves of the bodywork closing all gaps. The bent tubing will hold its shape so the cover does not need to be glued to the model. And since the edges that contact the bodywork and dash are just the thickness of the cloth and paper they look very much 'in scale'

The final step is to apply some very tiny 'pin heads' or even just paint to simulate the snaps and you have a good fitting and removable cover. I just need to get the right color and texture of cloth.