What is the best remedy for brown spots?

[US_Marine]

I assume the browning I see on my newest palm is some kind of fungal infection. The browning, aside from the usual browning of the tips, is concentrated in random areas in the middle of the fronds away from the edges . The browning as it progresses is becoming larger as it joins other browning areas.  It seems to be starting as white discoloration. The browning is affecting the oldest fronds at the moment only. 

Any thoughts or suggestions? 

[PalmsInBaltimore]

looks more like sunburn to me unless where you live in norcal is very damp this time of year

[Merlyn]

I'd also guess sunburn, @US_Marine.  They are ususally grown under shade cloth that filters out 30 to 50% or so of direct sunlight.  The odd red-brown blotches are a typical symptom.  Cocos will adapt to full sun over time, since they are natively full sun palms.  Just expose it to direct sun slower over a period of a couple of weeks.

[Harry’s Palms]

I get the same thing on my grown Pritchardia after a particularly wet winter. The last two years have been well above average(almost twice!) rainfall and I think the rain gets down into the crown . It is only on one or two fronds and stops doing it once it gets warm. Harry

[SeanK]

The final photo shows a potted palm indoors. However, photo #4 shows open sky behind the palm. I agree with others on sunburn. Nurseries should instruct buyers how to properly acclimate shade-grown plants outside.

[US_Marine]

The palm was a gift from someone.  They said they got it from Florida.  I did do some acclimating for sun but I am limited in how much shade i can give it.  So its been exposed to humidity/moisture in its past, and at least since I have had it- some sun with shade.  
 

[PalmsInBaltimore]

it's probably just adjusting to its new environment and conditions. The new leaves look great