White's Spectra V-3 upgraded to V3I W/ SEF 15X12 Butterfly coil, White's Vision upgraded to V3I W 12 in coil, Minelab Excaliber II, Minelab E Trac, Minelab GPX 5000, Discovery TF 900 2 box, Garrett Pro Pinpointer
From Gun World -- Friend was cleaning brass other day ... wetted down corncob media with mineral spirits and added cleaner (will check on brand)--- couple sprays from dispenser bottle -- results improved dramatically. Three hour run time.
CAUTION - Flamable Mixture as most stuff in that category is.