I have no idea what you are on about as i dont know that user and if i did maybe he has more than one guide so a link to what your talking about or even better still post on the actual thread your talking about instead of making a new one would have been a lot better,
That said it seems your having trouble soldering somthing to somthing, maybe bristles as thats been mentioned,
Take a look at
This thread as it should be of some help even if not totally the exact process your wanting to do,
Basics of any soldering is 'Clenlyness is next to Godlyness' meaning everything must be clean and free from dirt and especially oil and that includes the oil coming off your fingers, clean the items and then put them down,
Flux is a must, flux basically keeps the joins clean when making the joint, without flux the oxidisation coming off the material leaves a residue behind that makes the joint dirty and you will be forever trying to make the joint and the longer you try the hotter the piece becomes and the more dirt is introduced to the joint through the burning of the material,
If you really have to use an iron to solder bits together because you cant get a gas torch then you are limited to the types of solder you can use, the higher melting point solders (also the stronger ones) can not be used simply because the irons dont get hot enough,
You should be useing a big iron, the tip should be clean and tinned and make sure its up to tempreture before useing it,
The solders with the higher lead contents are the softer lower melting pint ones, the ones with a higher silver content tend to be the harder ones that need a torch to work with properly,
Stay away from electricians solder for making mechanical joints, it has the wrong properties and is unsuitable for most applications, plumbers solder is also a very weak and soft solder but with careful useage semi structual joints can be made,
Do not get solder with a flux core for making mechanical joints, the flux is the wrong type for the materials you will be useing as its meant for copper, silver or gold and not tin, nickel or zinc etc,
A separate flux should always be favoured as it keeps the joint clean and can be controlled without adding more solder,
Make sure your work is hot enough to take the solder before applying it, the aim of soldering is to get the area uniformly heated to the point where a careful introduction of the solder will, through capilleraly (sp?) action, flood the joint with an even layer of material provideing the best possable joint with the materials used,
I know its by no means exchaustive but its just a handful of tips that may help you along the way, without knowing exactlly what it is your making its hard to give any more definate advice,
P.s, All flux is corrosive, do not get it on your clothes,
