So, Blue Water it is! Looking at the various products, and old marketing info, I got confused, so I called up Blue Water directly and got the inside scoop. Not only that, he can beat any prices I found on the internet and appreciates the order because he gets commission (plus he spent 20 minutes explaining it all to me).
Here is the deal: There are 4 major makers of bottom paint: Interlux, Pettit, SeaHawk, and National Paint Supply (Blue Water and Jamestown's Total Boat products:
https://www.ipaint.us/).
I may mix up details, but National Paint used to make Nautical for many years and then sold it off to Interlux and the owner went to them. After a few years, he left and started Blue Water...or something like that.
Anyway, currently in ablative, they make Copper Shield (45% copper) and Copper Pro SPC (38% copper and 3.3% zinc pyrithione). And they also sell a "booster" that is a zinc omadine biocide.
The two above replace 3 paints from before: Coppershield 45 (45% copper), CopperShield 45 SCX (same as coppershield, but add Irgarol biocide), and CopperPro 67 SCX ( 67% copper plus Irgarol boicide).
Now, something that I learned in this research is that BASF (I think) stopped making Irgarol biocide, so all the paint manufactures had to reformulate a bit. This is why there isn't a true Interlux Micron Extra anymore. And what Blue Water rep explained to me is that "reformulating" requires new EPA approval for each product...EVEN THOUGH they are just REMOVING Irgarol from the paint, it has to get a new approval (2+ year). He said that they hope to have a 67% copper paint available next season, and also Irgarol may start being made again.
Wow, lots of info. So with all that said, my current choice is Coppershield (45%) and Copper Pro SPC. Both will come with free zinc "booster" (1 quart for each gallon). The price difference is about 20%, so I'm going to get the Pro SPC (which is comparable to micron 66 EXCEPT it can be used in fresh water...oh and is way less $$$$). He said there should be no difference in durability for hauling and it can go over any other bottom paint.
He quoted me prices that beat the special online sale prices by 5-10% (that and no worry about sales expiring). I think it was $129 per gallon for the Copper Pro SPC shipped with free booster (Copper Shield $98). Compare these with Jamestown at $179 and $129 +shipping! I'm going to place an order in a few days, also ordering other paint for my barge and stuff.
To order or ask questions, call Steve at 800-432-4333 extension 374