Paint question- Is there a way to seal just the top of a side table?

My hubby painted a side table with exterior paint. It's been 48 hours and the top is not exactly tacky, but I feel like if put the clock and picture frame back on it that were there before , they would stick or scar. Is there any way to seal just top? Should we wait longer ? BTW , we live in super humid Louisiana but I brought the table into the air conditioning once it was mostly dry. Thanks in advance for your help !
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