So yes, let's say you need to replace a through-hole capacitor on an oxidized board. I'd apply some of the SRA or Handcraft-Pro and heat the old solder, and get it out of the joint using either the solder wick or a solder vacuum.
Once the joint is free of solder, remove the capacitor. Clean the pads with the SRA or Handcraft-Pro flux and solder wick so that no solder is left on the pads. Clean the pads with isopropyl alcohol and swabs to remove flux residue.
Resolder a new capacitor in place with Kester 63/37 245 and (if required) Chipquik NC551. Clean excess residue with isopropyl alcohol.
for $30 it’s worth the gamble. i got this guy awhile ago and love it. silicone tip lets you smother the pad/component
Why link a SIXLTR knockoff, when the original Japanese-made tool is cheaper‽
Please ignore, I realized your link was for Amazon.ca, while mine was US. The original tool is a little more expensive. Still worth it, IMO.
https://www.amazon.ca/Engineer-SS-02-Solder-Sucker-japan/dp/B002MJMXD4/
https://www.amazon.com/Engineer-SS-02-Solder-Sucker/dp/B002MJMXD4
For u/TheShangWang, I'd also recommend picking up some good quality desoldering braid. Menda, MG Chemicals, or Chemtronics are the trusted ones around here.
The silicone doesn't burn. I was hesitant at first to touch the sucker to the iron tip, but eventually realized as long as you're not holding it there forever, it's fine. I heat the joint with the iron, bring in the sucker tip and press it down on the iron tip, slip the iron out and immediately hit the plunger. Works great.
this is the one I use.
The kit should be enough to get you started but you'll need something to get rid of solder like a desoldering pump or wick. I would get a desoldering pump with a silicone tip similar to this (there's cheaper versions online). You're mostly dealing with through-holes with switches so a pump is more useful but a wick is always nice to help.
If you plan on doing more soldering I would get something to practice on, some flux, brass sponge and tip tinner to clean, and more wire of course. Using a wider tip helps with getting all of the switch pins.