I have an Aniline Leather couch with cracking on the arms. Can I use the Leather Filler and Premium Leather Dye to repair?

You can’t repair Aniline Leather like you can a Finished / Pigmented Leather. Once you sand and apply Leather Filler to an Aniline Leather it then becomes a Finished / Pigmented leather and needs Leather Paint to cover the filler. Your not going to replicate that finish with Leather Paint.

You can rub Leather Dye into your Aniline Leather (once prepped with Leather Prep) but you can’t fill and sand the cracking. Dye takes on the colour is being applied to. So where there is colour now or a darker spot this will keep getting dark so the finish will be uneven. Thats how Aniline is.