Spiked shield and spiked armor

[Quirhid]

1a How much does a masterwork heavy steel shield with masterwork shield spikes cost?

Is it:
20gp fo the shield
+150gp because its masterwork
+10gp because its spiked
+300gp because the spikes are masterwork too
---
total = 480gp?

1b Can I add shield spikes afterwards?

2a What good is to have masterwork armor spikes?

2b Can I enchant my armor spikes?

2c Can I add armor spikes to my armor afterwards?

 

[Tessarael]

My thoughts:
1(a). 20gp for the shield + 10gp for the spikes + 300gp for masterwork (cost of masterwork weapon is more than cost of masterwork armor, use the larger) = 330gp.

1(b). I'd be inclined to say no. The shield needs to be changed structurally (e.g. where support bars are) for the spikes.

2(a). Masterwork armor spikes and masterwork shield spikes function like any masterwork weapon - you get +1 to your attack roll.

2(b). Yes.

2(b). Same as 1(b), no.

Just my thoughts ...

 

[shilsen]

1a How much does a masterwork heavy steel shield with masterwork shield spikes cost?

Is it:
20gp fo the shield
+150gp because its masterwork
+10gp because its spiked
+300gp because the spikes are masterwork too
---
total = 480gp?

Correct.

1b Can I add shield spikes afterwards?

In real life, probably not. In D&D, I don't see why not.

2a What good is to have masterwork armor spikes?

+1 to hit when bashing with the spiked shield.

2b Can I enchant my armor spikes?

Yes.

2c Can I add armor spikes to my armor afterwards?

See 1b.