Mixing WriteBeginTag And RenderBeginTag In The Same Code?

I am generating XHTML for a non-standard browser (Polycom Microbrowser). I would like to use the XhtmlTextWriter, but it ignores the border attribute on table. This is mostly like the correct thing to do since you should be using CSS to set the border. Alas, Polycom doesn't support CSS.

So when I Render the beginning and ending table tags, I need to use

HtmlTextWriter.WriteBeginTag/WriteEndTag instead of HtmlTextWriter.RenderBeginTag/RenderEndTag.
protected void RenderTableBegin(HtmlTextWriter writer)
{
//writer.AddAttribute(HtmlTextWriterAttribute.Border, "0");
//writer.RenderBeginTag(HtmlTextWriterTag.Table);
writer.WriteBeginTag("table");
writer.WriteAttribute("border", "0");
writer.Write(HtmlTextWriter.TagRightChar);
}
protected void RenderTableEnd(HtmlTextWriter writer)
{
writer.WriteEndTag("table");
//writer.RenderEndTag();
}

Other places in my code, I am using HtmlTextWriter.RenderBeginTag/RenderEngTag. Are there any known issues with mixing these?