How can you improve the drivers side seat bolster which has a couple of slight creases, i've heard people apply heat and get good results, are their any retrimmers on here or anyone that knows how you can improve these ?

 

A good vehicle trimmer can make them like new; I think they use a flexible leatherette paint? Possibly Fivos got his done when they did the foam base for him.

 

Depends on how bad the foam is and how as new you want them to look. Cloth over the area and iron over it using the steam from the iron. Don't forget to constantly check it isn't getting too hot. Adjust the temperature as you go.