The standox paint retailer in DHA and the nippon paint retailer in opp preedy station in Karachi sold the correct cavity wax, but it was a bit pricey and you needed to buy the tube wands with it too, the cans themselves were useless as is because the only way to dispense the product is to attach the original wands for the can from the same brand. Meaning you cannot use a nippon wand on a 3M can.
The wands were to be inserted into the cavities of the body after removal of access plugs where this wax could be sprayed in - it goes in as oil, then flashes off and a semi solid hard wax remains there for almost forever. You can choose to diy this wax too with some cheap candle wax block, some motor oil, parrafin etc and then spray it or brush it with something.
