The following macro will clear the shading and set the font as required when used with my add-in mentioned by Charles. I have included a test macro to call it.
Code:
Sub Test()
RemShading ActiveDocument
End Sub
Function RemShading(oDoc As Document) As Boolean
Dim oPara As Paragraph
On Error GoTo err_Handler
For Each oPara In oDoc.Paragraphs
If oPara.Shading.BackgroundPatternColor = RGB(255, 255, 230) Then
oPara.Shading.BackgroundPatternColor = wdColorAutomatic 'remove the shading
oPara.Range.Font.Name = "Calibri" 'The font you wish to apply
oPara.Range.Font.Size = 12 'The font size
End If
Next oPara
RemShading = True
lbl_Exit:
Exit Function
err_Handler:
RemShading = False
Err.Clear
Resume lbl_Exit
End Function