I'm guessing it was last painted 1975 - 1980. Don't know what kind of paint was used, guessing maybe flat or semi-gloss latex. I'm talking about the interior of it,by the way. The sills? are my biggest concern, some is down to bare wood, some partial paint left. I know I need to sc**** loose paint off. My main question is: can I use Flat Barn & Fence Paint? I have a gallon that I'd bought for the picket fence but now am more concerned about the porch.

By the way, I'm an inexperienced senior citizen.

Thank you.