I use Sunla 1.75mm filament. You have to watch the processing melt temperature on every reel as they do vary with colour. The white, for instance, processes at 190 to 210- degrees and the Orange, 200 to 230. I have found differing results with each different colour as well. White seems to print most things but I have had considerable difficulty with gold and orange. I have had to increase the nozzle temperature to around 225 to get anywhere.
I keep playing. I have loads of 1:32 scale oil drums made in different colours now. Good for the Scalextric but no good for the nerves.😁