There are a bunch of posts about this topic, but I thought I would share my experiments with three different techniques:
1. Micromesh to polish the layer of de-oxidized rubber off the pen and reveal the black rubber under.
Pros - not too messy; cheap materials; leaves pen with a beautiful shine, quick
Cons - takes effort; should not be used with pens that have chasing
2. Using Mark Hoover's de-oxidizing chemical.
Pros - can be used with pens that have chasing
Cons - messy; very time consuming; is not completely successful with all pens (see first pic below - super success, but below it not so much)
3. Using pensbury manor's pmnr9 dye.
Pros - effects are reversible, useful for pens with chasing
Cons - requires skill to apply evenly (I have made some pens look ugly!)
In conclusion, none can be called best. Each has its own uses. If the pen is smooth, then I tend to use micromesh. If the pen is chased, I use Hoover's de-oxidizing chemical. If I just need to work on cap crowns and blind caps, I will use pmnr9. And sometimes, I use a mix of more than one technique as below:
Please post any other techniques you might have used along with its pros and cons
Edited by siamackz, 31 January 2018 - 17:46.