I can’t deal anymore. Pulling hair out. I am using Lightburn I am trying to engrave on colour mdf 3mm but have tried various settings and still can’t get it solid, it is either too grainy or spotty I am about to throw my machine out the window. I got 100watt . Please could someone kindly assist me?
Not sure where you live, but if you are close to me, I could assist you with the throwing the laser out the window. 
Can you upload the file you are trying to engrave, as well as some screen shots of your cut settings window?
Looks like South Africa. </creeper>