PPG stock is like a house of cards and will likely crater as the recession gets going. The stock has increased from $75 in 2007 to near $197. That increase is enormous in just 7 years for a slow growth cyclical business! Do not even try to say it is not a sell because the P/E is low. The P/E for cyclical corporations like PPG is always low at major tops.
PPG and DOW are cyclic, so is CAT. The trick is to plan for it and they all have and are divested into medical. coatings, foam, and now biofuels and downstream Natural Gas. Cat is the master of this in an entirely separate sector, planning layoffs and hiring for surges in mining and construction.