Thats pretty much what Ive been doing, except I use the small marked cups. I havent tried a measuring stick. A syringe works well, too.

I bought, at one time, a 1-1/2 quart kit, which comes in squeeze bottles. Now if I buy a gallon, I refill the smaller bottles which are a lot easier to pour from.

: I use epoxies in the furniture repair part of my business also and frequently
: need just very small amount. Since the epoxy works well on a volume basis,
: I use a small straight sided(very important) container and just measure
: the resin and hardener into that in the appropriate quantities.

: for example, with WEST and it's 5-1 mix, I mark a thin stick at a 5 unit
: point, then make another mark at the 6th unit. I usually use 5/16 and
: 6/16; or 5/8 and 6/8ths. Pour the resin (I use the pump) to the first mark
: then add hardener to the second. With MAS I use a 2 -1 range - i.e- say
: 1/4 then 3/8.

: The secret to small quantities is the container. Look inside the plastic top
: from a can of spray paint- you'll see a very small straight sided section
: in there- cut that out using a band saw or what ever. You will then have
: the container to then mix some where around a teaspoon full, quite
: accurately. I've used this method for many years now. Just be careful to
: hold the container level and pump very slowly so you don't go past the
: lines. And when you are finished, if you'll turn the little cup over so
: the epoxy can drain out, once it's cured you can peel the left overs out
: really easily and use the thing over and over.

: If you use empty tin cans, you can use the same method to prepour quantities
: of resin when working on a larger job. Set five or six cans of just resin
: out, ready to have the hardener added. Then when you need more, just put
: the stick in, pour hardener to the correct line, stir and go. Stick can be
: reused over and over since there is no cross use - it's just going into a
: can that you are gonna stir up anyway. Quantities then depend on size of
: can and units selected.