You may choose to have multiple tabs on a single layout...Product & Service so that you can handle them separately.
This makes the assumption that you will invoice service and product separately. Is there ever a time where restoration and a new print will be on the same invoice?
There are a lot of advantages to treating your goods and services both as "products" that you sell and list as line items. This does not require, however that you use the same portal for both nor that you can't list them separately on an invoice.