Hi all, I'm new here. We own a small rental house about 2 hours away. It was built in 1908 but we don't know if the garage/shop was built then or (possibly) as late as the early 40's. The garage has cedar shingle siding and has apparently never been painted, it's in rough shape and it's our next project. We haven't been able to find shakes/shingles that match the originals in any way except the fact they are made from the same wood so using the best match possible we'll patch what's missing and then we're going to paint it to match the house - a pale yellow, white trim, red doors. My real question how will the final paint job be effected if I use some of the many buckets of interior latex we already have as a base coat for the 'real' coat of exterior paint. Unpainted, weathered cedar soaks up paint like crazy and we just can't afford to buy gallons and gallons of paint. I have only 3 gallons of stain blocker (Zinsser brand I think) and know from experience it won't cover even one side of this small garage. My plan is to use any and all of my left-over latex - can by can, not mixed into a big bucket (they are all brands and levels of gloss so they won't mix) - until the shingles seem to be pretty well covered. I was going to start using the darkest color and flattest finish first on the theory that the next layer of paint would stick better to a flatter finish. The Zinsser is white and sticks to anything so my hope is that it will act as 'glue' to hold the final coat. The garage needs to look "better" it doesn't have to look fabulous. I'll be doing all of the priming while my dh is dealing with other repairs and had planned on using a brush but should I use a pot sprayer instead? The house is in one of the dampest areas of the NW if that means anything to anyone.