Hi Pat,
When you export to Excel with ExportFormat.Html, then you can set the e.Styles dictionary with proper CSS values for styling the element to be exported when the ElementExporting is raised for the RadGridView.
You could also apply some styling (Background, Foreground, Font) as demonstrated on the Exporting online example. Still it does not have the options that the RadDocument can suggest.
All the best,
Didie
the Telerik team