>> What is the efficacy (in practice and hive health) of scraping drawn comb
>> off plastic foundations every three-four years?

The Bell operation felt years ago that wax contamination could be reduced by 
removing a large part of the wax and letting the bees rebuild.

tens of thousands of frames were run through a boganshutz uncapper adjusted 
to cut off almost all the wax. The wax removed was rendered.

I felt it helped remove wax contamination and when running ten frames in ten 
frame equipment made it easier to work the bees.

I have used a chain flail uncapper myself to remove wax.

Both methods are very fast. machines are faster than hands.

bob 

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