i just used insl-x painton an inground. i used a product called marquis base-mix. its an exposed aggregate product. that was the only issue. floating it out was not fun. i let it dry just for a a day, per recommendation from the manufacturer based on where i live.some spots were down to concret, others were just normal wear. the insl-x paint was only $42 per gallon @ lowes, & my 7500 inground only took 3 gallons to finish. the 1st coat u could obviously see the patch from the original. since i live in florida i painted at night. let set up for 2 days, then put the 2nd coat. i admit im suprised on how smooth the 2nd coat made it look. a tip i learned myself, since i was using a broken concret block to smooth down what i missed floating out (old constructoion trick) around areas that are exposed concret, take the block & u can hear a difference in the sound. that means ull need to chip some more original away, because its hollow underneath & there is water there. the paint recommended no acid wash. just remove the lose stuff, & an intense pressure washing. how ever, on ythe bare concret, before you patch it, spray it down w a 50/50 water, muriatic acid mix 2 remove the oils, etc soaked in it. but immediatly after, a 50/50 water /baking soda mix to nuetralize the water/acid mix. iu think i covered everything. oh wait, wanna laugh? i ran out tape & thought 1/2 hour lATER I COULD JUST WIPE THE PAINT OFF THE TILES. nope. & 2 WEEKS LATER & I STILL HAVE 3 BLUE TOENAILS. ha!