I painted a Daiso iPhone 15 clear hard case in a Showa retro style. This one is "Cola". The creation process is as follows: 1. Sand the surface of the clear hard case. 2. Apply primer to the surface → let it dry. 3. Base coat of white acrylic paint (TUNER Snow White) → let it dry. 4. Paint "Cola" using a stencil sheet → let it dry. 5. Rust painting → let it dry. 6. Apply two coats of clear coat for surface protection (using car paint). 7. Leave it for 24 hours for complete hardening. I used a torn sponge to dab the paint on, so the surface has a bumpy texture. I applied a fairly thick layer of clear coat, so the surface is glossy. Regarding durability, as a test subject, I've been using it for about a month, and while there are some scratches on the edges, it's at an acceptable level. It depends on how you use it, so honestly, I'm not sure how long it will last. Previously, when I used 100-yen acrylic paint as a base, it peeled off quite a bit in two weeks, which led me to use TUNER paint. This is a hobby project, and I haven't paid much attention to the back. There are primer marks and tape marks on the back. Also, since it's fresh from the work, there may be a smell of clear spray, but the smell will dissipate over time, so please be aware of that. As mentioned above, it takes time and effort, but it's a personal hobby level. I'm selling it at an affordable price, so I would appreciate it if you could overlook the minor imperfections.