I've got this jacket but it's not as waterproof as it used to be - what's the best method for re-waterproofing it without ruining the suede effect?

Tech Specs:

Material:

[Shell] Amaretta suede HyVent 2L; [Lining] bunny fur in torso, collar, and hood, taffeta in sleeves 

Insulation:

60g Heatseeker synthetic 

Waterproof Rating:

Not specified 

Breathable Rating:

Not specified 

Core Venting:

No 

Pockets:

2 Hand, 2 chest cargo style, 1 internal security, 1 internal goggle 

Seam Taped:

Yes, fully 

Powder Skirt:

Yes 

Hood:

Yes 

Zip-in Compatibility:

No 

Recommended Use:

Skiing, looking foxy 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China