Microload Plastic Coated Dumbells?

My gym has dumbells in increments of 5lbs. When doing dumbell work I have to increase 10lbs (5 each hand) each time. That is too much for me.

Is there a way to increase using 1-2lb magnets even though the dumbells are plastic coated? What do you guys do?

I was thinking of talking to my gym about getting weights in between current weights, but I need a solution in the meantime.

-Q

a magnet that weighs a couple of pounds should be plenty strong enough to hold on to the dumbell even with the plastic coating