Why can't we just take a drop spreader with concrete dye and line either the sides or a center line. We use to do that with remote planes and cars both on ice and fields, and it worked good and didn't damage either surfaces. That is just this ole geezers 2¢’s worth and if this is a real problem. I guess we should let some of the past pilots that have flown into Alton give us their 2¢’s.
