Here's a couple of videos about dripping rubbing alcohol onto paint. In the UK use Surgical Spirit. Choose one or the other technique to try or you could do both.
With acrylic paint
or with spray inks. You can fast forward this video to 3 minutes in. You will need to gesso your page before doing this technique with spray inks.
I suggest you experiment on paper before you work in your journal.
Hope you enjoy these techniques.
Don't forget to share your work with us all.