How to make a gloss effect

[golitan11]

How can I make a brush with an inner gloss (shining)? It is possible to do it using the additive option (maybe there is another way) but on dark colors it is ineffective (and that`s what I wanna do, like a metal shining effect). Thanks!

[bonnie]

To make a gloss effect I use grey values and I use the additive option with transparency, you can have a look here

But I am not the master of gloss effects