If using Grove gear, after market intersection fairings may or may not work.
The old school process of using clear packing tape and modeling clay is still viable. I got a tip from VAF that heavy duty hair spray is a good release agent. It worked for me.
Trim the fairings, then make the cut to form the front and back half. I used a SS putty knife slipped between the wheel pant and gear leg as protection during the cut. The two halves are then glassed to the wheel pant. Finish with the normal body work (micro, sand, micro, sand…..).
Carl