Replies

1. 
   donpapenburg | Apr 11, 2003 03:12am | #1

   How much paint is on the stucco ? If you have a lot of coats you will remove stucco in order to get the paint off . The paint acts like rubber . If you only have a light coating of paint just about any grit will work so get what will be cheapest by the ton.I use U.S. Silica #14 because the smaller #15 leaks out of my hopper. This will be a one time shot do not reuse the sand,it is cheap so use the smallest grit ,usually the cheapest per ton , if you don't have a lot of paint . The smaller grit gives a better finnish . Larger grit cuts more aggressive usually cost more.

1. 
   migraine | Apr 11, 2003 03:59am | #2

   It looks like there is only one, well applied coat of paint on the stucco.  Do you have a "ballpark" formula for how much sand per square foot of wall.  I will be doing this on Sat/Sun and I want to make sure I have enough material and preferably not too much.  I will be blasting about 75 lineal feet X 8 feet high(600 sq ft ) plus maybe I'll blast of the driveway in front of my shop.  Hope to get rid of overspray and other guk from 7 years of finishing cabinetry and auto work.

     Thanks for your help.    -Brian

1. 
   donpapenburg | Apr 11, 2003 06:57am | #3

   Are you going to repaint? If so you donot have to get all of the paint off. Just the "loose" stuff . I think that guk infront of the garage will not disapear all that easy. I would hate to give a guestimate on the amount of sand for tha wall . If it were steel I would say that you should be able to get it done with 500 to a 1000 lb. I spent about 6 hr. and 2ton of sand trying to clean up a cement block spray booth . I had to acually blast the cement awy from under the paint to get it off the wall. However that was an extreme because it was more than 1/8" thick.

   The other thing is there is a learning curve . If you had done this before it would be quicker .  Make sure that you get the hard plastic helmet /with incoming air.  Ductape the sides of the lens so that light does not shine in the sides. then ductape a strip over the top or bottom of the lens, make tabsby sticking the tape to itself   1/4"orso  , so that you can pull it of and reposition it over the eched  part of the lens. This will make it easier to see what you are doing . If you are in the dark it is easier to see the light .

    Get the big compressor , at least 175 cfm  . Don't try to do this with your 5hp. sears compressor.

   At 100psi a 1/4" nozzle will use 490lb. sand at 137cfm.  I have a formula for sand /sq.ft. some place but have never found it to beremotely close ,way over on there estimate.

1. 
   migraine | Apr 13, 2003 08:22pm | #4

   Don, thanks for your reply.  I finished the sand blasting yesterday and every thing went as plan except that I should have bought twelve 100lb bags of silica sand not ten.   At $6.50 a bag it was cheaper and faster to have my 17yr old son run the waste sand through my wife's baking sieve than go out a buy more.  Plus I would have had to pay more for the rental of the compressor and blaster.  When my wife found out what I used, did she ever give me the "stink eye".           Thanks. -Brian

1. 
   donpapenburg | Apr 14, 2003 04:40am | #5

   Yep I know what you mean. Them wimon don't like to share tools no how. But keep the chisels hid or they will become feminine prybars.

   Glad the blasting turned out .

   Don