Fixing runs in Future wax?

Nasty.....I've had good/bad results with Future runs. I've had some of the runs completely dry and go hard (easy to rub out with 1500 wet and dry) and I've had some runs stay kind of gooey, even weeks after airbrushing.
If you're lucky and the run dries hard, then use very fine sandpaper (like 1200 or 1500) and carefully rub in one direction using NO WATER (I've had the Future go a little soft when wet sanding), until the run is removed. Then when the run is removed, re-coat with Future to get rid of the sanding marks.
If the run stays tacky, carefully shave off the high spots on the run, allow 24-28 hours to dry, then sand (dry) and re-coat.
That should fix your problem. Make sure you dust on several light mist coats, allowing 4-5 minutes inbetween before you hit the model with a wet coat.
Good luck,
LeeTree

Thanks LeeTree. I'll try as you suggested. I was misting on light coats, but they looked bumpy and I got scared that the finish would end up like 150 grit sandpaper so I took a deep breathe and piled it on thick. Luckily all the rest of it came out ok, but I've learned my lesson!

Yep, I think you've just learned the same lesson I've learned 3 or 4 times now. There seems to be this magic window with Future. If you think it looks bad and you need another squirt....STOP. Let it settle and dry and chances are it will be perfect. It is possible to get a slick wet coat without runs, but it's sorta like driving a rally car up Pike's Peek... a little on the edge at all times...

M.

Yeah,
Future looks awful for the first two or three coats - sometimes I end up with 4 or 5 before it seems to want to accept a wet coat. Then it all seems to lay down very well. At first it always seems that I'll end up with a coat about 2mm thick, but it lays down pretty well.
I'd suggest painting something (like a tin can or a Coke can) with flat paints and then experiment on those so you can "get your eye in" or get a feel for what's needed as far as amount of Future neede to get that thin glossy coat.
Good luck
LeeTree