Products of this industry include household appliance housings and parts, cooking and kitchen utensils, and other non-automotive job stampings.

Check the stampings for buffing or rounding.

Yes. You will have to work around the ink stampings and knots, but the wood will take a stain.

Automotive engineering is how the car will perform. Automotive design is what the car will look like.

If the rifle has stampings of .223 Rem or 5.56x45mm on it, then yes it can. If it has stampings of other cartridges, then don't do it! Almost all guns have markings of their caliber on the reciever or the barrel. If your confused, find a professional (Gunsmith, firearms enthusiast,etc) and ask.

Hope this helps.