Well this is quite an important question (to me).
I have been using pure gasoline to take tar off the paintwork, then give it another wash.... is this a BAD idea?
And can you guys recommend an alternative, because i dont want to ruin the paintwork....What do you use?
Thanks!!

Yes, bad idea. Use a proper bug and tar remover. Meguiars etc has them

poor poor GT-4....... gasoline melts paint man!!!