Mark, I myself burn any frames, but research by Dr Mark Goodwin found that
a strong bleach solution killed any surface spores in about 5 min.  Could
be used on the frames.

Re the boxes, the chimney fire scorch works well-- the point is to heat the
box interiors hot enough to melt any wax and propolis into the wood.  I
wouldn't use gasoline!

Another possibility is to divide the boxes into the minimum number of
hives, stock with shook bees, and treat all with Tylosin for the first
month.  That will likely bury any remaining spores under wax and propolis
where they will do no harm.  Tylosin has been shown to be effective at
eliminating an AFB infection, which suggests that there are few infective
spores left where they could cause reinoculation.  Should an infection
become apparent later in the year, you could then dispose of that colony,
with little loss.

The decision is entirely up to you as to what to do--it's a
cost/benefit/gamble analysis.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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