This filament from Prusa research has a gorgeous shine. I did have problems with bed adhesion so I recommend using glue stick to ensure it stays down. Prusa uses Natureworks 4043D which is an older PLA formulation. Prusa filament is sold in 1kg sizes on plastic spools. However due to location it can have a high shipping cost.
https://shop.prusa3d.com/en/filament/46-silver-pla-filament-1kg.html
Recommended Print Settings
Temperatures
- Hot End - 210 Celsius
- Bed - 60 Celsius
Speeds
- Print Speed - 50mm/s
- First Layer Speed - 30mm/s
- Perimeter Speed - 30mm/s
- Infill Speed - 60mm/s
- Cooling Fan Speed - 100%
Structure
- Perimeters - 2 or 0.8mm - 1mm
- Top and Bottom Layers - 4 to 5 or 1mm
- Infill - 15%
Retraction
- Distance - 0.8mm*
- Speed - 35mm*
- Z-Lift - 0.6mm
Bridging
- Bridge Flow - 85%
- Bridge Speed - 30mm/s
- Bridge Cooling - 100%
Physical
- Bed Adhesion - Glue Stick
- Nozzle Type - Brass (Standard)
- Enclosure - None