Mooseman The lube is just a clear liquid, not unlike 3 in 1 in consistency, but obviously not an oil.
Best time apply the lube is after stripping down and cleaning your A/B, then just coat the first 50% of your A/B needle in the lube, and I add a drop to the trigger assembly to ensure that everything works smoothly.
I'm not familiar with your A/B, but the lube would not damage it in anyway, and would stop dried paint adhering to the delicate components of the A/B.
Hope this helps.
Karl