[Malcolm]

What grit sand paper should I use for feather sanding exterior paint? Some of it is wood and some masonry. Is it a bad idea to use sand paper on masonry walls?

 

[joecaption]

We have no pictures so your going to get about a dozen different reply's.
Never once used sand paper on masonry.
Pressure washer or wire bush. How old is the house?
Been tested for lead paint?

 

[chrisn]

What grit sand paper should I use for feather sanding exterior paint? Some of it is wood and some masonry. Is it a bad idea to use sand paper on masonry walls?

for wood,I start with 80 or 60 and work my way down( or up). Never sanded masonary

 

[Bud9051]

I'm knocking off the seams on the inside of my poured foundation to make it smoother for adding rigid insulation. I'm using a 4" diamond cup and it takes it off like butter. A standard grinding wheel would do as well and being a little slower would mean I wouldn't have to be as careful.

My point is, sanding would not work for me. If you are smoothing a rough surface as opposed to removing any amount of cement than consider a grinder. If you are removing paint from the masonry the sanding would only remove the paint on the high spots and not in the crevices.

Pictures would help.

Bud

 

[Malcolm]

Should I do the following steps?

1. Pressure wash to knock off loose paint
2. Feather sand wood and wire brush masonry
3. Clean with TSP

Or, should I flip 1 and 2

Here are some pics after scraping:

Under Roof Deck: