badger spray gun advice needed...please help
 

hello, i'm thinking of buying a "badger abrasive spray gun kit"....if
anyone out there has experience of these kits can anybody tell me how
long the 12oz of alliminium oxide lasts if it is continiusly
sprayed...does it last long enough to etch a design measureing
aproximatly 2 feet square??

many thanks in advance if anyone can advise

A