In article .com,
says...
But I learned that multilayer
boards need a lot more soldering iron power than normal, and even 40W
may not melt the solder right away while 50W will.

I have an old Wen 199 gun. It doesn't state any wattage rating. Will that
do, or is it too hot?

I used 2mm copper
desoldering braid to clean out the holes because I didn't have very
good luck with solder suckers.

thanks for that. badcaps.com doesn't mention braided wick, but that's
what I have on hand so I'll try.