I had some concerns with rust in box-sections/sills of my 62 sprite. Drilled some holes and found that overall was not bad, but did have some rusty areas. After blowing out (compressor and vacuum) sand and debris, I applied coating.

Spray worked as described and I had no problems with tip. I purchased 4 cans and I used 1 on right sill. I plan on completing other side and working my way back to trunk.

So far, GREAT PRODUCT!