The brown bumps you describe sound like normal aerial root primordia that may or may not continue developing, depending on humidity. As for the rest, it sounds like perhaps scale or mealie bug - perhaps a combination. If the "mold" looks like very fine spider-webbing on close inspection, suspect spider mites, which usually occur on older tissues & in dim locations) lower parts of the tree, under leaves or where shaded from the light.

Can't offer a treatment suggestion until you determine the cause. Pictures? Applications of cold pressed neem oil at two week intervals will clear up even the scale eventually. Applying it in a 50/50 solution of water/rubbing alcohol will provide substantial immediate knockdown of mites & crawlers. If you want to investigate further, just ask about the neem. Insecticidal soap is another alternative, but a positive ID is really needed.

Al

I posted two pictures in the gallery forum. Thanks for your thoughts and time Al. Jen