Step 1: Find a planet which has curious deposits that have runaway mould. (Runway mould looks like brown balls and they usually spawn with 5-15 balls. Alternatively you could use your scanner and look for a symbol which has three stars and then go and see if it is runway mould). To try and increase you chances of finding a runaway mould planet, you could find a gek system that has a few planets (the more planets there are, the higher chance you have of finding runaway mould), warp to that system, use your scanner to check for any fungal mould and fly to that planet and continue with the steps below.

Step 2 (optional): try and find 2 runaway mould deposits that are roughly 600-1000 units away from each other and place a base computer in the middle.

Step 3: Set up a base near each runaway mould deposit and place down lots of medium/large refiners. You might want to build a platform to catch the runway mould because when you start to destroy them, they start to roll away.

Step 4 (optional): You might also want to set up short range teleporters between the two bases or even if you only have one base. I would recommend placing the teleporters 100-125 units away from each other and powering them with solar panels connect to batteries. If you only have one runway mould spot you should try and set up teleporters up to 500 units away from the mould spawning spot, this will make sure that the runaway mould respawns when you teleport far away enough.

Step 5: Gather the runaway mould from one deposit, place it all equally in the refiners and run (or teleport) to the other deposit.

Step 6: Collect the nanites from the refiners and keep repeating this until you have the amount of nanites that you wanted. (if the runaway mould does not re-spawn try going a bit further away).