ok here goes,,,,
firstly I have no idea what it is made of. you can find sources on line that states as a fact that it is made from fish oil and just as many sources that says that it isn't. well that's the interweb for you
.
what I can say from extensive use of it is that it WILL increase you catch rate, both on the boat and from the shore.
a few years back we spent an entire summer testing this out on fish baits while fishing for rays, huss, tope and conger.
from the shore there was 4 of us fishing 2 rods each. one with wd-40 added and one without. without question the mackerel sprayed with wd-40 easily out fished the natural baits 3 to 1.
and that included when we switched the rods over on the tripod so both baits were in the same area at different points in the session. this was the case session after session.
on the boat we tried it too using the same rigs as the lads around us. the first few times the lads were a bit sceptical and dismissive of it, but as the day went on we were constantly catching more rays than the lads around us. after a few fruitless drops by guys around us the can was soon being passed around the boat and rays, dogs and huss were soon coming up on all lines. this was repeated on numerous trips with different clubs around ports in Ireland.
I don't claim to know why it works, what the environmental implications are and what it might do to the fish who snaffle a wd-40 laced bait.
I just know from experience that it DOES in fact work as a bait additive.
just mu 2 cents lads