To make pouring from the gallon can a bit easier, I don't remove the metal insert that is in the can opening. I use an awl and punch 3 or four holes in the metal insert. The resin pours out at a nice manageable rate and I don't lose a drop. If I want a little faster pour rate, I squeeze the can as it pours.
You can use a pump with silmar 41. Unfortunately, unlike epoxy where the pump will last a long time, don't plan on using the silmar 41 pump a second time. The resin will kill the internals of the pump in no time at all.
Don't suck on a hose to get a siphon going with silmar 41 (or gasoline). It's just not a good idea. Not only is inhaling resin fumes bad for your health, you'll waste a lot of time afterwards trying to get the hose clean before you give up and finally throw it away. Save your lungs and your hose. Don't siphon.
I use glass mason jars to store my resin in the shop for day to day usage. The can gets stored somewhere cooler (which in South Florida isn't the shop). Wiping the rim of the jar (with a piece of paper towel with some alcohol) after each pour keep the lid from sticking.
Ed