I believe I noticed something like that on top of one of my secondarys. I
tried to remove the scum using a paper towel, and then siphoned the rest of
it off with a straw (don't swallow it). And then I made sure to add 1
crushed campden tablet to the must and topped up. I'm not sure what
happened there, but after I did this, it did not show up again. Others may
have better suggestions.
Darlene

"glad heart" > wrote in message
om...
> It's been puzzling me. My Rhubarb wine has been resting in its second
> secondary for a few months. Today I racked it and fined it since it's
> not clear. It's got great color - pink like grapefruit.
>
> A yellow/gold scum has been sitting on top of the wine all this time.
> I haven't had time to think too hard about it. Any idea what it is?
> Or if it's hazardous to the outcome?
>
> Thanks, Jim