[TokuKnight89]

This is probably a very generic Toku question, but I do have a specific Sentai example in mind: how do spark squibs work? I know that older versions are usually pasted onto the actor/suit with a similarly colored patch to mask it, but there are apparent inconsistencies.

As for the example, in Kakuranger Ep. 5's preview for Ep. 6, Tsuruhime slashes Nurikabe with no obvious sparks. In the actual episode, Tsuruhime performs the same exact movements on Nurikabe but with actual sparks this time! There's no apparent difference in the shots or the placement of both Tsuruhime and Nurikabe.

If classic sparks are manually added before filming, why would there need to be a reshoot? Was the former a mistakenly-added outtake/test shot to get the movements properly choreographed before adding the actual squibs?