Silicon free polishes?

Hello folks,
it's annual time and we plan to give our LS1-f a bit of a buff and
polish. A product called NuFinish was recommended, however a quick
Google search finds that it contains silicon and I understand that
this is not a good thing should any future repairs be required. Is
this correct, or is silicon getting a bad rap?

Our club has used a Meguiars marine product called M4516 High Gloss
Polish, I am led to believe that this contains no silicon but have yet
to confirm that.
See
http://www.meguiars.com.au/productde...otec t&show=3

Can anyone speak with authority on this subject? Any other products
that I should know about? The gel coat is in good condition, it was
machine buffed last year and shows little if any oxidisation to my
untrained eye. I imagine a quick polish followed by a wax would be
sufficient, so the Meguiars marine products are looking good:
http://www.meguiars.com.au/product_2...&subcat=Marine
Care&subsubcat=Polish

Thanks, Bernie.

PS: I'm in Australia where car care products like NuFinish and
Meguiars are readily available, but WxBlock is NOT!