First thing, we have to fix is additional geometry. In the previous part of this tutorial, I talked about problems with the ‘Thicken’ tool. It adds new vertices which we don’t want. To fix this problem we will use the ‘Merge’ tool. Select all of the vertices and activate the ‘Merge’ tool. Its job is to merge vertices based on a distance you specify. You can change the distance by dragging in the viewport or changing the value in the tool properties.
When vertices merge, they will deselect, which helps to see where vertices are being welded. Change the value up, but be sure you don’t weld vertices which create the form of our hood. It will typically be a really low value.