Dear Jessica, What exactly is the problem with the soldered seams?
Where did you place the solder paillons to join the seams. . .inside
or on the outside of the box? Are you working with a texture on the
outside walls? Did you polish all of the walls, inside and out,
well before soldering? Why did you anti-flux the inside seams?
What grade of solder did you use. . .easy, medium, hard? How much
heat and how long did you heat your piece and in what stages did you
solder all of the walls? How many seams. . .5? What type of
polishing tools do you own to get inside that little area?
Will be glad to help out here with a little more info from you.
Happy finishing. . .a very time-consuming process:)