My benchy’s are usually spot on. I Bought this filament from Boots Industries web closing sale, and after having to respool the filament onto a new reel - their cardboard crap fell apart - I printed a temperature tower. They recommend 190-230. Up until 205, the tower snapped easily. I printed this benchy at 210, build plate temp at 60, with a flow rate of 90%, filament diameter set to 1.69 (as measured), 60mm speed with 5s minimum time/layer and 10mm minimum speed, fan 100% at 1mm… I think those are the important specs… All three of the four rolls I bought from them have printed with similar results.
I lowered the print speed down to 40mm, tried jacking the filament diameter up to 1.75 in case it was over-extrusion, printed at 205° instead of 210°… Slowing the print down helped a LITTLE, but nothing else made any significant difference.
I know benchy is a tough little guy, but I printed the filament roll from this model - Retro Filament Spool Keychain by TheNewHobbyist - Thingiverse - and the finish is almost as bumpy as the benchy. It’s hard to see in the photos, but trust me… it’s not good.
Any help/advice would be greatly appreciated!
My first thought is that the filament is “wet”. Google how to dry the filament and see if it helps.
Everything I’ve seen about that says to go about 175 degrees, but my oven only goes to 200 and I doubt that is very accurate. Plus, I’ve heard that if you don’t do it right you could make matters worse, so I’m kind of scared to try that.
Just now, I did another search and I saw this - http://www.printdry.com/ - and I got to thinking. I have a food dehydrator. I wonder if that might help/work? I guess I could give that a shot…
I am making one out of my dehydrator. Not finished but it should work fine.
Funny you should say that. I just cut the centers out of a couple of my dehydrator’s trays - I never use it anyway - and I am baking a roll now. I’ve got it set to 140° and I’ll see what that does. Thank you 
Cool - I actually bought 2 more trays for mine and a Tupperware top that looks like a cake top cover. Cut the webbing out of one tray and glue the tub to it and then it sits on the tray below.
That way I can still use it for dehydrating stuff!
Well I’ll be a monkey’s uncle! I ran the dehydrator on 145° for four to five hours and then I dropped it down to 95° for another 12 hours and sure enough… I reprinted the little spool tonight and it looks SO much better! I cannot believe that four rolls, brand new, straight out of the box, all four needed dehydrating! No wonder that freaking company went out of business!
Thank you again!
That is so cool!!! Inspires me to get mine finished up and working!
WOW, got to go find a cheap dehydrator now to play with. I have some filament that gave me the same finish you got with the bumps.Thanks for the info.
