Here is a one of the more useful tools and techniques that I accidentally discovered while adding weld beads to my U‑673 boat. I did not want to use putty since it is not well suited to this task and is fairly difficult to get consistent results. I needed to find something quick and most of all... easy.
STEP 1: Adding the Basic Welds
STEP 2: Making the Weld Bead Tool
STEP 3: Enhance the Weld Bead
Evolution of the Technique
The tool & technique I discovered is similar to that used by armour modellers to create weld beads. They use an Xacto blade with a broken tip to score plastic; but I don't know if they use a plastic strip as the foundation for the bead.
I feel that using my tool is safer to use than a broken Xacto blade... no sharp edges to have to worry about other than the tip.
AND... using my tool & technique gives more realistic weld beads, since it imparts the proper semi-circular arc to the bead and allows the bead to dome up. Using the tip of a broken blade gives flat scores and does not make the plastic dome up.
Its all about sharing the knowledge!