Thanks, everyone, for responding to my inquiry. I appreciate the safety warnings (always important) and the specific product recommendation. And thank you JEFFPO for your specific fact-based statement.
I have always regarded a forum as an opportunity to inquire, to learn, and to benefit from the information and feed-back presented. It's often - as in my case - an opportunity for someone new to an interest or situation to add-to understanding and enjoyment of that interest or situation. This was my second post to the OGR On-Line Forum, and the replies to the first were so specific and helpful that I printed them to save in my files on the subject. Now, at the risk of being banned from the site, I need to state that many of the replies to this inquiry were somewhat less-than-polite wise-cracks and made me feel like a total fool for asking a simple and nagging question. The sustainability of this hobby - like most others - depends on a steady flow of new enthusiasts ready to fill and swell the ranks. And unless the treatment of those new individuals is polite and information-based the hobby and the industry are sure to be short-lived.
Thanks for the opportunity to express my opinion, and I've learned from the experience.
(That's why there are forums).