You are right that it is their rejection of revelation that condemns. Can you show me from the Romans text where anyone accepted that revelation?
The theme of the text (the context) is the depravity of all human beings, whether Jew or Gentile. Every human being without exception is guilty before God. There is an order in nature which points to God, and there as a law written in the hearts of all people that has been broken, by which they are condemned (see Rom 2).
You will search in vain for any person getting saved by law, either the law of Moses or the law of general revelation. Here's the passage from Romans 2:
12 For
as many as have sinned without law shall also perish without law: and
as many as have sinned in the law shall be judged by the law; 16 In the day when God shall judge the secrets of men by Jesus Christ according to my gospel.
and now the parenthetical explanation:
13 (For not the hearers of the law are just before God, but the doers of the law shall be justified. 14 For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves: 15 Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another
Your question: What happens when a person
accepts general revelation? My answer: Rom 1 says that they
knew God. But were they obedient to the revelation? In no way. How can it be said that anyone "accepts" general revelation based on the text at hand?
The state of
condemnation that all people are in due to their disobedience
is the static condition into which the Gospel intrudes.