Yes it is. Here is what I do in my games (except here I have replaced every greater than or less than symbol with a bracket so the script doesn't disappear). I put this directly in the title on the page:
[span style="color: #c57800;"][strong][font size="5" face="GARAMOND"]Insert Title here[/font][/strong][/span style]
I found this by scrolling through the Advanced Editor forum and hitting control F through about twenty pages, finding relevant threads, reading them and then asking questions in them. Sadly, the search function doesn't help much. But it was time well spent. Also, of course, by making threads asking. As you can see, I make a lot of them, and people are very willing to help. ;)
I do NOT know if this works for strike through. Haven't tested it.
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EDIT- sorry, I forgot to turn off the bold tags in my previous post using < /strong > (minus spaces)
EDIT 2- I do NOT know if this can be done without having the font piece in the script. I more or less copied it from a thread, then added the < strong > tags and other things inside.