Many potters ask if you can use underglaze on top of glaze. Some potters experiment with mixed results. Others use it as a successful underglaze technique.
Troubleshooting Commercial Underglazes – Sue McLeod Ceramics
POTTERY TOP - ニット・セーター
Spice Up Plain White Ceramics with Bubble Painting
YFDB Underglaze Pencils, (Black, 2ps) Underglaze Pencils for Pottery. Black Underglaze Pencil Precision Underglaze Pencil for Pottery… : Arts, Crafts & Sewing
Glaze Archives - Page 2 of 2 - Pottery Tips by The Pottery Wheel
Bubble Glazing- Take One - The Cozy Chipmunk
6 Different Ways to Use Underglazes With Ceramics - The Art of Education University
Dry Hands from Pottery Clay - 10 Tips for Skin and Nails
6 Different Ways to Use Underglazes With Ceramics - The Art of Education University
Underglaze decals ontop of glaze? : r/Pottery
A Beginner's Guide to Underglazes - Kness