Browsing Windows Shares on multiple subnets

Is it possible to browse windows shares on a pc connected to router1 from a pc connected to router2?

PCs connected to router2 have internet access and I am able to browse and access a USB drive connected to router1 from a PC connected to router2. I cannot browse windows shares on PCs connected to router1 from a PC connected to router2.

ISP <---> cable modem <---> router1 <---> router2

router1
WAN IP - ISP Provided
LAN IP - 192.168.1.1
Static Route 192.168.2.0 255.255.255.0 192.168.1.2

router2
WAN IP - 192.168.1.2
LAN IP - 192.168.2.1