In general, what is the preferred method for mixing body filler?

The preferred method for mixing body filler is to use a separate knife for each step, as this ensures consistency and reduces the risk of contamination. Each component of the body filler, typically the resin and hardener, needs to be mixed thoroughly to achieve the right chemical reaction for curing. Utilizing different knives helps to prevent cross-contamination of the components, which can affect the curing process and the final strength of the filler.

This method allows for careful handling and better control over the mixing process, ensuring that the filler achieves the desired consistency and performance. By using a separate knife for each step, it reduces the chance of leftover filler from a previous mix interfering with the current batch, leading to a stronger and more reliable application.