This is a very common practice in New Zealand, for both timber preservation
and for the salvage of woodware (not frames) from hives with AFB.
http://www.beekeeping.co.nz/disease/man08.htm includes a description of the
use of paraffin wax dipping in the context of AFB sterilisation, including a
simple plan and the (important) time/temperature parameters required...
You can also get a bibliography re: paraffin in the NZ context from an
autoresponder: [log in to unmask]
Nick Wallingford
http://www.beekeeping.co.nz
Sunny Tauranga, east coast of the North Island...