I used kilz latex based primer to block water stains on the drywall in my basement... worked perfectly, 1 coat of primer, and 2 coats of paint, and there is no bleed through. I dont know about odour blocking though...
C.J.
1997 TSi AWD 2.3L 6 bolt (Carillo Rods, Wiseco pistons, Cometic headgasket, ACL bearings, removed BS, FP3's, Crower springs/retainers, ARP hardware), FIC 950's, Aeromotive AFPR with SS lines, Walbro 255HP, PTE SCM61, Tial wastegate, Greddy Type S BOV, short route FMIC, 3" turbo back, AEM EMS, 3 bar map conversion, BJs SMIM, 75mm TB, Innovate LC-1 Wideband, 18" Focals, Bridgestone Potenza RE040's, Tokiko suspension.