I would start cheap and easy initially. First, burp the air out of the system. Free. If that doesn’t fix it, change the radiator cap, use proper pressure from factory. $10. If that doesn’t work, change the t-stat. $20. So far you’ve only spent a little time and money, probably less than $30 and an hours time. Next I would take a serious look at the radiator, they wear-out and are not too expensive (got one for my '89 for $100) and are pretty easy to change. After that, let us know. Accords are pretty simple and these issues are not too hard to trace to a proper fix. I can direct you to a website that is FULL of older Accord owners, mostly a fix-it type forum like this one but specific to older Honda Accords. Keep driving it . . . my '89 has 565,000 miles on it! Runs great, no kidding. Rocketman