Hi Upier - I used a Griot's kit from autogeek.
https://www.autogeek.net/griots-garage-paint-perfection-kit.html
Many will bemoan the fact that there are better or more advanced chemicals, but I found these older Meguirar's products work really well on the soft single stage paint on my 911. Getting ready to do the Klasse sealant this weekend. Overall I am very happy with the results so far.