Remove tar stains – Is a preparation worth it?

Moin together, with us in the village the road was redeployed. In the current weather but released too early. Now the whole village has beautiful tar spots on the car. My first attempt with Teerentferner was successful. It can be cleaned overall well. However, I will probably need 3-4 cans, as the whole car is really affected all around. To do this some questions: – is the paint subsequently damaged by the tar or the cleaning? How important is it, the really complete – Do I necessarily need a new seal? – Is it worth a conditioner for removal and care? What could this cost according to experience? – any other tips for cleaning? Tomorrow I will now spray my car generously in front of the washing machine and wipe it off and then drive through the washing machine again. Thank you for any advice.