Paasche
Hi, we stopped at a thrift store and bought a as new Paasche H # and H S# airbrush. It has the side reservoir and two sizes of glass jars and air hose. $3.50. I can use it for my art work. Any one know if this will work with baking soda as a micro abrader for fossil prep? Bicarbonate of soda if there is a difference. Before I try it. Will be more likely to do 2-3 inch fossil hash plates with Crinoids to start.
Thanks, Bob
For fossils, one wants to scribe away bulk matrix and abrade fine matrix. Abrasion that doesn’t cause damage is done slowly and carefully at very low pressures (typically), with relatively soft abrasives (3.0-3.5), under modest (10-20x) magnification.
If a prep goes fast, you are likely to have significant damage to the specimen. If an aspiring preparator can’t afford super-expensive purpose-built tools, that’s ok. They simply have to understand the level of prep that they can achiev