:\ Yes that should work.. should be a 3/5 to a 5/5 success rate.

for metal gown i use either;
Golden pao, or any of the gloves. magic, heart, golden, or wizard.
Pao is better because its already a rank 21 where the golves can sometimes be rank 20 and annoying to get 21.. i sometimes waste them and use 2 or i save them to use for making white loops and just use the 21 and 22's i get if i have space.

also double check that you are using and making steel and NOT iron swords, because they look the same.

you are using superior alchemy yes? because thats has a base jump of +3. what that means is you can easily get +3 jump and lower and chnaces to get +4 is 64& and +5 is 82% or higher is rare without a book.

junior has a base jump of +2 which means you will have to keep try till you get a +3 result (see reason above) or use a book to jump it.

and primary has a base of +1..