Thanks guys for the advice, I think I'll just paint over it. The oven cleaner was not the best idea given my wife can have an asthma attack with various substances, and this one even got to me.
What started this was I am building a kit of the USS Blue Ridge, and the Pitt Road kit has some lovely detail along the boat deck area on both sides, but if I install the midship deck (yes it's split in to 3 pieces ) it would be hard to get in there with a wash and dry brush to bring out the detail.
BTW what is US Navy Grey (1) and (2)
Oh well, this can only build character