I am replacing my below the waterline fittings before I apply an epoxy barrier coat. The new drain plug is brass....what is the best screw to use to mount it? I don't want to go with SS again because the old ones nearly corroded away (10 years). Boat is wet for about 3-4 months/year and occasionally hauled once or twice a month. If I use SS should I just coat the screw head with some ablative anti fouling paint??? I'm also going to replace the scuppers but those will hopefully screw together.