The 130x code is a serious misfire to the point that it might damage the catalytic converter; the 030x misfire is intermittent and more of an "advisory" code. My car is turbocharged with a large inlet pipe in which the stock MAF sensor is placed, which makes for less than optimal signal amplitude and quality and so I get 030x codes on occasion, that I have also learned self-clear insofar as the check engine light turns back off after enough drive cycles.
I do know there are a number of cases that wiped cam lobes are the cause of a misfire 130x code, but it sure seems to me like it is a big stretch to assume that wiped cam lobes are the ONLY possible cause. I have inspected my cam lobes and they look fine, but I do not get a 130x code, just the more benign 030x codes.
your RTV may be the problem, especially if it interfered with the passages for the idle air control motor or allowed a vacuum leak.
Check all the basics, fuel, spark, air (e.g. fuel pressure, injector function, spark plugs, coil packs, vacuum leaks and throttle operation, etc) before assuming the worst. It does only take maybe 30 minutes to R&R the cam cover, so it is worth a look too probably.