All I know Bill, is that George Birringer told me years ago that he used the natural shellac flakes and that was good enough for me. I saw examples of crap finish jobs using the pre made box store “jug” sh.t which basically in my opinion, ruined helmets. I have never used it. As a long time bar band rock guitarist, I know that the “nitro” was used on all those early 50’s-60’s Fenders and Gibsons however, it is highly flammable! They are using it on higher priced guitars today as supposedly the wood breathes and delivers better tone. However, Clapton would sound like Clapton even on a $200 guitar.