Can I do multi-layer pours?

Yes, FlowCast is suitable for multi-layer pours. Additional layers can be poured without surface preparation when the previous layer is tacky to touch. If the previous layer is no longer tacky to touch, you will need to wait for the resin to reach sufficient hardness (approximately 72 hours), then scuff the surface with 220 grit sandpaper. Remove excess dust and debris with compressed air and wipe the surface clean with denatured or isopropyl alcohol before pouring the next layer.