Vine removed from wood exterior has left a hard barnacle on the surface. What is the best way we can remove this barnacle without further damage?

I want to seal my weathered painted house trim. To keep the weathered look and seal the paint & raw wood. What do you recommend?

My husband just painted our lower underhang , beige to match the house. It was a semi gloss, it had a light sheen.Now he used the flat paint, that he used on the house, and it looks all smuggy to me. Would a second coat help that look ?

I am starting my own painting business and am trying to get a rough idea how much to charge per square feet for interior walls. What would be a fair starting rate for prime and one coat,without materials and taxes?

I need to paint my factory ceiling which is corrugated metal with wiring and etc. I’ve been getting weird pricing. Is there not an industry standard as per sq ft to paint ?? How do I know who is being real and who is just out to get rich ?

I have just started a painting business and would like your help in determining how to estimate a job, is there a formula?