The problem is that '4oz' is a measure of weight and also a measure of volume.
But then by using the term 'gallon', it would imply that this ratio of 32/1 is based on volume because that is generally the context in which the term gallon is used; a measure of volume. BTW and not intentionally adding to the confusion, a gallon is 128 FLUID OUNCES.
At the risk of being wrong, which I flaunt with on a daily basis, I'm going to suggest that your ratio is based on volume and not weight, in which case a scale is unnecessary.
The 32/1 ratio would be very simple to work with if you were mixing a quart of finish at a time. This would be fine if you were shooting 10 or 20 cues during a spray session but I don't think that's what you want to do.
So, keep cutting your ratio in half until you reach a workable amount of volume for your particular finish needs: 16oz to 1/2oz, 8 to 1/4, 4 to 1/8, etc. Eventually you'll find your Goldilocks moment; just right.
I shoot finish quite often but I don't shoot a lot of finish (more confusion). I shoot auto-clear exclusively and depending on the finish I've chosen to shoot that day, my ratios are very simple, 4/1 or 2/1.
I have 4 different brands of auto-clear in my shop to chose from depending on application and circumstance but in each case my measuring is done with teaspoons.
If all else fails, you could take the easy way out and call the manufacturer and ask for clarification. To save face, just use a false identity.
