NO you cannot use filters or optical accessories in front of a solar wedge, because the concentrated light may cause the glass in these accessories to crack, paint to burn, or metal to melt.

ALWAYS put accessories like filters, reducing lenses, flatteners, bino-viewers, or Barlow lenses BEHIND the solar wedge between the solar wedge and the camera or eyepiece, which is safest, and gives better performance.

Please refer to the instruction manuals for the solar wedges here.