Preventing warp with ABS

You don't have to wipe it down with acetone after every print. I'm currently on my 20th (+/-) print without cleaning or adding more hairspray. You are correct, though. A generous mist is all you need. Let that sit for a few before heating up and printing.

Aside from that, this is a good writeup especially for large prints.

I get a lot of shell warping with the filament that came with the printer, so you might try another spool. The spool included with my printer was in an unsealed bag in a marine environemnt for some weeks, so I'm, going to try drying it.

This thread is missing the best solution, IMO: purple glue stick.  It coat of purple glue stick has been all I need to print a large object the size of the entire bed and with sharp corners with no warping.  It's also much less messy than hairspray and doesn't get all over your rods.  I use it on every print.  For small prints, just take a damp paper towel and smear the last coat around some.  For larger prints, wipe it clean with water and apply a fresh coat. 

Glue stick is also cheaper and available everywhere, unlike the aquanet extra super hold that is generally recommended if you use hairspray.  Glue stick all the way!

Enough to notice its there but not so much that it is caked on.  If you are printing on glass, look at it at an angle and you should see a hazed finish instead of glossy glass to see if you missed a spot.  Just put it in the area that you need for this particular print.  After a couple days or a couple dozen prints you should really begin to get a feel for it.  I will never go back to hairspray.

There are countless factors that effect ABS and it warping, from the extrusion and bed temps, the print settings such as wall thickness and infill rate, the design of the print and even how you place it on the print bed, just to name a few. Hairspray or glue stick? To me it's like, Ford or Chevy. They both work well but I now prefer the glue stick, (my hobby room was smelling like a beauty parlor from the hair spray). As mentioned, just a haze is all you need and cleaning is easy. I use a sponge rinsed in hot soapy water and it wipes right off. I do this after every print, the reason, Elmer's disappearing purple glue boils at 100c, the same temp I run my bed at and if you leave it on or add to it without cleaning causes the glue to begin to collect in small bumps or blisters on the print bed which transfers to the bed side of the prints, it's a lot harder to sand out a dimple than a high spot.