No special access issues
Use the parking of Hiekkahelmi in Paimio. The official address is Valtatie 589 Paimio, but the road that takes you there is named Hiekkahelmentie. From the main parking, walk to the parking for disabled people (blue squares on the ground) and turn right on a wide trail. After some walking, there is a big ditch to the right. 15 meters after that you turn right towards the forest on a barely visible trail. Then you basically need to follow the GPS-trail, because the rest of the approach is not easy to describe, especially after some of the forest was cut down recently.
The top of the crag can be accessed quite easily from either side of the crag.