2 degrees is standard minimum draft angle. A small part like that might blow off. I found Honey Wax works well on that material. I did some tests and PVA was the least effective on MDF. Since it is already made I would give it a try what the hell. Stuff is easy to bust out, just add water! Just do your layup then drill a hole in the top to accept your air blower tip. Be sure to only drill thru the glass and not the plug. Then tap with a rubber mallet.
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