Yeah, gweedo, the spf hasnt changed in all that time, as I understand it, except for the enviro-friendly blowing agents.
The NRF even did a study on many foam roofs in many different locales, and they have determined SPF to have an indefinite life cycle. Of course, it has to be properly prepared, proprtioned, applied and maintained.
The first pic looks like it may have been applied to a cold heat-sink substrate, producing an uneven reaction and cure.
Roofboss, if you ever spray anything, it pisses you off more to have to stop and move that freakin hose just when you get movin’. The foam hoses are freakin heavy.