Interesting compound to preserve metals

[Destruction]

Hi,
Found an interesting compound in old Soviet book about archaeological items and their preservation in museums. It's positioned as a good working one for copper and its alloys...may be zinc as well?
I recite: The surface of copper and its alloys can be preserved from oxidation using the wax covering with addition of benzotriazole. To get the compound you have to dissolve wax in turpentine and benzotriazole in ethyl alcohol, and then mix them together.
Now the question (before I'll write the exact % of every substance ) : what do experienced people --like Paul R--think about it? Is it worth of attention? Benzotriazole seems to be a good inhibitor...but since the book is old and Soviet , the main question is if this substance is not hazardous for health. Thanx for attention!

[Paul R.]

Yes, I have seen this process before. I have seen it being used in both water artifacts and ground dug items. It seems to be impressive. However it still a new chemical process on artifacts. Not a lot of data on long term storage, and if it changes under any conditions. Like humidity, heat dryness. I am also consernered the process is not completely reversable.
I have posted a MSDS link to the actual benzotriazole chemical through lihold one of the main companies.http://www.lihold.com/msds.htm
The National Museum of Australia Canberra ACT has done some research on this process, but remain full questionable.

[Destruction]

Hi Paul,
And megathanx for a quick response! As I said, this one is quite old, it's from a USSR book of 1990 year originally.
Just in case if someone will be interested, here are the % of every substance:
Wax-10%
Turpentine-69,5%
Benzotriazole-0,5%
Ethyl Alcohol-20%
It is mentioned that this compound works much better than usual wax covering, 10 g on 10 square cm, and must be renewed every 2 (!) years.