Garage Floor Efflorescence

My garage floor looks ugly because of spotty efflorescence, recurring especially in winter. It disappears when I power-wash it but after a few weeks it recurs. I have also washed it with mild acid which, too, makes is go away for a while.
My home is 30 years old. There are no cracks in the floor. The white stuff just does not look right.
Can I paint over this stuff with epoxy, or cover it up somehow?
Anyone has the same problem and solved it?
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On 04/29/2015 05:16 PM, Walter E. wrote:

http://www.delawarequarries.com/cleaners/efflorescence.html
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On Wednesday, April 29, 2015 at 6:48:16 PM UTC-4, philo wrote:

In addition googling "painting over efflorescence" will produce a lot of info. The efflorescence is minerals leaching through the concrete via moisture from below. I've never tried to paint anything that had it, but I would suspect that it's likely the paint will fail as the process continues under the new paint.
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