AutoCAD Inventor :: Part Lines In IDW

I had a sketch in one of my views of a planned piece of equipment.  I hatched the equipment to show where it would be placed on my shaded views.  The part outlines behind the sketch were visible through the hatch.  I turned the visibility off of the part lines once I was finished with the sketch, everything is OK.  

Now that the proposed piece of equipment is no longer going to be used, I removed the sketch from the view, but my part lines are missing, making the view look a little odd. See below.  One side of my filter (gold part) has the outlines visible, the other side shows up without the lines.

After removing visible lines, is there a way to turn them back on again??

IV 2010 Tube & Pipe SP4; ACAD Mechanical 2010;
2.5 ghz Xeon Processor
8 gb RAM
Windows 7 Professional x64
EVGA GTX 560 2gb DDR5