Tom, thank you for taking the time to reply. I'll start a search on those lectures as soon as I can. I'll be picking up Ralph Meyer's book on the second, then I can learn all! I've already discovered that everyone seems to have their favorites (mediums). So far I'm using Liquin, but also have linseed oil to try next. Toxicity could be a problem for me, so I'll look at others also. Searching here has been very informative so far.
Karin, the lumps I'm referring to are all my own creation. Its how I apply it, not the paint itself. I've read literally all of your posts on your application of paint and use of medium and have learned much. Now I need to continue to apply my knowledge to many, many canvas's to see where I am in this great mix of talent. In the meantime I'm still scrapeing my self-imposed lumps off.
Jean