By its very nature, vitamin A causes drying of the skin and exfoliation. A bevy of prescription and OTC vitamin A topical preparations make use of this side effect to treat a variety of skin concerns. The term Retinoid refers to any Vitamin A based molecule. It's a category, similar to saying antibiotic. They may be related, but some are stronger and more effective than others.
Pototype sheets for Weld Quality Workmanship Standard. Undercut. Definition: A groove cut at the toe of the weld by the welding arc and left. unfilled. Depth of undercut shall not exceed 1/32.
with a small undercut before welding you can make a repair almost invisible. We have a spray welding outfit and I bet it has not been opened up and used in 10 years, we use a mig. Originally Posted by abarnsley. I would not have used metal spray for a simple electric motor shaft.. They are just bubblegum steel.. Just take .015 or so off (undercut gets the weld join area under the machined area, for better appearance), slather on some weld with a mig.