I think $600 is well spent because I can see it a very messy job and not only that, they reapply for free annually for lifetime.
This is a good point.
I paid $700 for rust proofing, undercoating, diamond gloss, and alarm w/remote start 7 yrs ago when they had a 2 bay garage on Lyell. (I also paid $100 bucks for reapplication every year until I went to the Henrietta location that informed me this was a free service
)
I would expect $6-700 for rust proofing and undercoating. Last I knew they had "new car" packages where you could get the whole 9 yards; interior protection, rain X, diamond gloss, undercoat, rust protections, piant chip protection, and probably some other non-sense stuff for like $1000.
Looking back I would of got the paint chip protection on the hood. They put some kind of clear protective film on it. Mine is quite dinged up now.