Enlighten me, refresh me or just wallop me along side the head to jar my memory 

 -  pine sap, I know, pick it off the trees, but what are the differences between pine tar, pine pitch, and brewer's pitch( which I got)?  I have used pine tar, turpentine, and linseed oil, equal parts, to make a varnish.  I used it on my lodge poles, but got it on the wooden canoe site
Hawkdancer