I haven't used Thompson Enamels yet, one because I don't have proper ventilation and two because I wan't to educate myself first.
So let me see if I understand this and please correct me if I'm wrong and/or add to this.
The concern is Scilicosis, which is a chronic lung disease caused by inhalation of "crystaline silica". Which I am assuming Thompson Enamels contains, but I don't know.
Adittionally ways to prevent the dust particulates (Crystaline Silica) is to use proper ventilation to remove the dust particulates from your work surface and work area. Wipe down with damp cloth to clean work surfaces as not to stir the particulates during the cleaning process and in future working sessions. A Ventilator (not a dusk mask) can be used as an added prevention. From everything I have read the concern is the inhalation of the particulates into the lungs, not the absorption.
See this link for definitions of Scilicosis:
http://www.lung.org/lung-disease/sil...silicosis.html
See this link, particularly page 4 to prevent inhalation of the dust particulates:
http://www.cbs.state.or.us/osha/pdf/pubs/3301.pdf
Can anybody tell me what if any other concerns regarding the use of the Thompson Enamels exists, other than Scilicosis? or can you confirm that this is what the concern is?