After a not so thorough research on this forum, I decided to have the frame my '93 Honda XR650L powdercoated. I instructed the shop to make sure that they plug in the holes for the dry sump system. I even brought the dipstick and all the necessary hardware to insure that sand does not get into the frame. They assured me that it was not needed since they were going to plug the holes anyway. They even instructed me to take the dipstick and oil strainer screen home with me. $230 later, i brought the frame home so excited and all. I slowly started to peel the bubble wrap then inspect the work closely that's when i notice that there was fine sand particles inside the sump system:foul: just by sticking my finger in there. Sorry this is getting long... Anyway panic started to set in , i then proceeded to rinse the inside of the frame with kerosene just to see if indeed there's sand in the frame. Sure enough there's some sand particles, which is probably silica since it's black sand, coming from the down tube. I have have rinsed it with about a gallon of kerosene:foul: It seems to be clearing out but i'm afraid that i am not getting much into the frame where the gas tank rests. Would it be advisable to rinse it with soap and water let it run till it overflows for about 10-15 minutes then rinse with soap, then kerosene or gasoline, then ATF oil or any oil that is thin enough to go to the crevices. I am thinking about compressed air too, then repeating the entire process again as many times as it takes. I need advice please from the people that know. Please don't tell me that it is hopeless. I am going to the coaters tomorrow to bring my complaint. Obviously they sure don't know what they were doing they just wanted my business. I should have researched more into powder coating and make the decision based on fellow thumpers that have done it not from other opinionated people. But that's the price i pay for not doing the homework!!! Looking forward to meaningful advice from the experts. Thanks in advance!